Emax

  ----- Original Message ----- 
  From: zrennaya 
  To: emax@yahoogroups.com 
  Sent: Friday, March 02, 2012 11:48 AM
  Subject: [emax] Emax pedal input and control voltages


    

  Hi everybody!

  I have another issue with my Emax, I've tried to use a CV signal to alter the filter cutoff -since there's only a sinewave internal LFO. The manual says the pedal input receives standard CV signals but here's what it does for me: even if the pedal input is not assigned to anything in preset definition, when I send a CV signal, the display jumps around different submenus, on the main page it jumps around presets and when the cursor is on some parameter to adjust, it changes the values, so basically it does the same job as the DATA slider. 

  The other thing is, this is a MIDI controllable CV source, so MIDI CC values 0->127 means -5V -> +5V control voltage and even if I try to recalibrate the pedal input, when the cursor is over a parameter value, when I turn the MIDI knob, there's no increment between cc values 0-51, then some weird increment jumps between 52-59, then no increment between 60-124, then major jump between 124-127.
  Consequently, when I assign the pedal input to the filter fc, the cutoff frequency is jumping around in the same fashion, while the submenus jump around on the display at the same time.
  Could anyone please give me some advice, or knows wether I'm doing something wrong or it's the emax's fault? Thanks a milion!!



  

[Non-text portions of this message have been removed]

>
> ssm octal sample and hold ic is damaged
> 
> ssm2300 exchange for a smp08 by analog devices its a pin for pin replacement and has a better slew rate
> 
> the pitch wheel the modulation wheel the volume slider and data slider are cv sources the ssm2300 samples these and send the digital data to the cpu which then processes the info and sends it to the smm2300 that out puts the digital control data to a cv analog output for controlling the filter or vca or panning
> 
> you need to check the manual as i dont have it in front of me but therte are several ssm2300 octal sample and hold multiplexer ic 
> 
> you need to check the manual for the 1 that samples the voltages from the controllers
>   ----- Original Message ----- 
>   From: zrennaya 
>   To: emax@yahoogroups.com 
>   Sent: Friday, March 02, 2012 11:48 AM
>   Subject: [emax] Emax pedal input and control voltages
> 
> 
>     
> 
>   Hi everybody!
> 
>   I have another issue with my Emax, I've tried to use a CV signal to alter the filter cutoff -since there's only a sinewave internal LFO. The manual says the pedal input receives standard CV signals but here's what it does for me: even if the pedal input is not assigned to anything in preset definition, when I send a CV signal, the display jumps around different submenus, on the main page it jumps around presets and when the cursor is on some parameter to adjust, it changes the values, so basically it does the same job as the DATA slider. 
> 
>   The other thing is, this is a MIDI controllable CV source, so MIDI CC values 0->127 means -5V -> +5V control voltage and even if I try to recalibrate the pedal input, when the cursor is over a parameter value, when I turn the MIDI knob, there's no increment between cc values 0-51, then some weird increment jumps between 52-59, then no increment between 60-124, then major jump between 124-127.
>   Consequently, when I assign the pedal input to the filter fc, the cutoff frequency is jumping around in the same fashion, while the submenus jump around on the display at the same time.
>   Could anyone please give me some advice, or knows wether I'm doing something wrong or it's the emax's fault? Thanks a milion!!
> 
> 
> 
>   
> 
> [Non-text portions of this message have been removed]
>

From: jammie.emma@...
Date: Fri, 2 Mar 2012 12:09:53 +0000
Subject: Re: [emax] Emax pedal input and control voltages


  



ssm octal sample and hold ic is damaged

ssm2300 exchange for a smp08 by analog devices its a pin for pin replacement and has a better slew rate

the pitch wheel the modulation wheel the volume slider and data slider are cv sources the ssm2300 samples these and send the digital data to the cpu which then processes the info and sends it to the smm2300 that out puts the digital control data to a cv analog output for controlling the filter or vca or panning

you need to check the manual as i dont have it in front of me but therte are several ssm2300 octal sample and hold multiplexer ic 

you need to check the manual for the 1 that samples the voltages from the controllers
----- Original Message ----- 
From: zrennaya 
To: emax@yahoogroups.com 
Sent: Friday, March 02, 2012 11:48 AM
Subject: [emax] Emax pedal input and control voltages

Hi everybody!

I have another issue with my Emax, I've tried to use a CV signal to alter the filter cutoff -since there's only a sinewave internal LFO. The manual says the pedal input receives standard CV signals but here's what it does for me: even if the pedal input is not assigned to anything in preset definition, when I send a CV signal, the display jumps around different submenus, on the main page it jumps around presets and when the cursor is on some parameter to adjust, it changes the values, so basically it does the same job as the DATA slider. 

The other thing is, this is a MIDI controllable CV source, so MIDI CC values 0->127 means -5V -> +5V control voltage and even if I try to recalibrate the pedal input, when the cursor is over a parameter value, when I turn the MIDI knob, there's no increment between cc values 0-51, then some weird increment jumps between 52-59, then no increment between 60-124, then major jump between 124-127.
Consequently, when I assign the pedal input to the filter fc, the cutoff frequency is jumping around in the same fashion, while the submenus jump around on the display at the same time.
Could anyone please give me some advice, or knows wether I'm doing something wrong or it's the emax's fault? Thanks a milion!!

[Non-text portions of this message have been removed]




 		 	   		  

[Non-text portions of this message have been removed]

 From: zrennaya <zrennaya@yahoo.com>
To: emax@yahoogroups.com 
Sent: Friday, March 2, 2012 7:52 AM
Subject: [emax] Re: Emax pedal input and control voltages
 

  
Thanks jammie..again!

So if I got you correctly, that particular ssm2300 has several channels (I'm guessing 8), emax uses one for each of the onboard CV sources and if they all work correctly it's only the pedal input channel that's messed up and it splits its signal to the same output as the data slider for example, plus the sampling itself is also messed up on that specific channel?

And sample and hold in this case means it's a basic AD converter and on the analog processing end there's a same basic DA one, right? I mean, the onboard controls are pretty smooth considering that but do you think their resolution is good enough for me to use an already D->A controller and go A->D->A with them again? I'm talking about a higher-rate saw LFO.

Thanks!

--- In emax@yahoogroups.com, "jammie" <jammie.emma@...> wrote:
>
> ssm octal sample and hold ic is damaged
> 
> ssm2300 exchange for a smp08 by analog devices its a pin for pin replacement and has a better slew rate
> 
> the pitch wheel the modulation wheel the volume slider and data slider are cv sources the ssm2300 samples these and send the digital data to the cpu which then processes the info and sends it to the smm2300 that out puts the digital control data to a cv analog output for controlling the filter or vca or panning
> 
> you need to check the manual as i dont have it in front of me but therte are several ssm2300 octal sample and hold multiplexer ic 
> 
> you need to check the manual for the 1 that samples the voltages from the controllers
>   ----- Original Message ----- 
>   From: zrennaya 
>   To: emax@yahoogroups.com 
>   Sent: Friday, March 02, 2012 11:48 AM
>   Subject: [emax] Emax pedal input and control voltages
> 
> 
> 
> 
>   Hi everybody!
> 
>   I have another issue with my Emax, I've tried to use a CV signal to alter the filter cutoff -since there's only a sinewave internal LFO. The manual says the pedal input receives standard CV signals but here's what it does for me: even if the pedal input is not assigned to anything in preset definition, when I send a CV signal, the display jumps around different submenus, on the main page it jumps around presets and when the cursor is on some parameter to adjust, it changes the values, so basically it does the same job as the DATA slider. 
> 
>   The other thing is, this is a MIDI controllable CV source, so MIDI CC values 0->127 means -5V -> +5V control voltage and even if I try to recalibrate the pedal input, when the cursor is over a parameter value, when I turn the MIDI knob, there's no increment between cc values 0-51, then some weird increment jumps between 52-59, then no increment between 60-124, then major jump between 124-127.
>   Consequently, when I assign the pedal input to the filter fc, the cutoff frequency is jumping around in the same fashion, while the submenus jump around on the display at the same time.
>   Could anyone please give me some advice, or knows wether I'm doing something wrong or it's the emax's fault? Thanks a milion!!
> 
> 
> 
> 
> 
> [Non-text portions of this message have been removed]
>


 

[Non-text portions of this message have been removed]

  ----- Original Message ----- 
  From: Chase Smith 
  To: emax@yahoogroups.com 
  Sent: Friday, March 02, 2012 4:30 PM
  Subject: Re: [emax] Re: Emax pedal input and control voltages


    
  My understanding is that the emax sends a cv out of the pedal input maybe on the ring of a trs jack and that with the ground goes to the inputs on a pot and the wiper output goes back in on the tip.  I think it expects you to plug in a different type of pedal, than something that would just send a cv.

  I've asked about this here before because I had a problem (this is with an emax II) trying to run the pedal input from a cv sequencer.  

  Can anyone clarify this?  I'll try to look up my old post later, but now this has me curious about it.  I do remember making a "pedal" with a pot so I could just turn a parameter in realtime so I know that part is true.

  ________________________________
  From: zrennaya <zrennaya@...>
  To: emax@yahoogroups.com 
  Sent: Friday, March 2, 2012 7:52 AM
  Subject: [emax] Re: Emax pedal input and control voltages


    
  Thanks jammie..again!

  So if I got you correctly, that particular ssm2300 has several channels (I'm guessing 8), emax uses one for each of the onboard CV sources and if they all work correctly it's only the pedal input channel that's messed up and it splits its signal to the same output as the data slider for example, plus the sampling itself is also messed up on that specific channel?

  And sample and hold in this case means it's a basic AD converter and on the analog processing end there's a same basic DA one, right? I mean, the onboard controls are pretty smooth considering that but do you think their resolution is good enough for me to use an already D->A controller and go A->D->A with them again? I'm talking about a higher-rate saw LFO.

  Thanks!

  --- In emax@yahoogroups.com, "jammie" <jammie.emma@...> wrote:
  >
  > ssm octal sample and hold ic is damaged
  > 
  > ssm2300 exchange for a smp08 by analog devices its a pin for pin replacement and has a better slew rate
  > 
  > the pitch wheel the modulation wheel the volume slider and data slider are cv sources the ssm2300 samples these and send the digital data to the cpu which then processes the info and sends it to the smm2300 that out puts the digital control data to a cv analog output for controlling the filter or vca or panning
  > 
  > you need to check the manual as i dont have it in front of me but therte are several ssm2300 octal sample and hold multiplexer ic 
  > 
  > you need to check the manual for the 1 that samples the voltages from the controllers
  > ----- Original Message ----- 
  > From: zrennaya 
  > To: emax@yahoogroups.com 
  > Sent: Friday, March 02, 2012 11:48 AM
  > Subject: [emax] Emax pedal input and control voltages
  > 
  > 
  > 
  > 
  > Hi everybody!
  > 
  > I have another issue with my Emax, I've tried to use a CV signal to alter the filter cutoff -since there's only a sinewave internal LFO. The manual says the pedal input receives standard CV signals but here's what it does for me: even if the pedal input is not assigned to anything in preset definition, when I send a CV signal, the display jumps around different submenus, on the main page it jumps around presets and when the cursor is on some parameter to adjust, it changes the values, so basically it does the same job as the DATA slider. 
  > 
  > The other thing is, this is a MIDI controllable CV source, so MIDI CC values 0->127 means -5V -> +5V control voltage and even if I try to recalibrate the pedal input, when the cursor is over a parameter value, when I turn the MIDI knob, there's no increment between cc values 0-51, then some weird increment jumps between 52-59, then no increment between 60-124, then major jump between 124-127.
  > Consequently, when I assign the pedal input to the filter fc, the cutoff frequency is jumping around in the same fashion, while the submenus jump around on the display at the same time.
  > Could anyone please give me some advice, or knows wether I'm doing something wrong or it's the emax's fault? Thanks a milion!!
  > 
  > 
  > 
  > 
  > 
  > [Non-text portions of this message have been removed]
  >

  [Non-text portions of this message have been removed]



  

[Non-text portions of this message have been removed]

From: "Ted Summers" <djtbs1@...>
To: <emax@yahoogroups.com>
Sent: Friday, March 02, 2012 4:54 PM
Subject: Re: [emax] Re: Emax pedal input and control voltages


> If I understand what was said, it was attempted to connect a different,
> external device (not a pedal) to send a control voltage onto one of the
> connections of the emax pedal input.
> If I am wrong in what my understanding is, then ignore this post....
>
> Well, this is quite simply, an electronics question.
>
> The Voltage is coming out of 1 contact, and is used as the reference by 
> the
> IC.
> As the wiper (pedal) is moved, it affects the return voltage in reference
> to the original voltage signal and (depending on the circuit) the
> difference to ground as well.
>
> To inject a signal from some other device I wouldn't expect that to
> necessarily work properly.
> There is no guarantee that the other device's reference ground plane is 
> the
> same.
> That scenario can create a difference in ground potential, a ground loop
> hum can result, bad value can result, etc.
>
> Is the other device using the same pin / connections for the ground and
> reference?
>
> If not, there is potential for damage of both units as well, since you
> could cause a short or overvoltage condition, exceeding the max voltage
> limits of the ICs...
>
> Just something to think about...
>
> Ted
>
>
>
>
>
>
>
> On Fri, Mar 2, 2012 at 8:30 AM, Chase Smith <plus_321@...> wrote:
>
>> **
>>
>>
>> My understanding is that the emax sends a cv out of the pedal input maybe
>> on the ring of a trs jack and that with the ground goes to the inputs on 
>> a
>> pot and the wiper output goes back in on the tip.  I think it expects you
>> to plug in a different type of pedal, than something that would just send 
>> a
>> cv.
>>
>> I've asked about this here before because I had a problem (this is with 
>> an
>> emax II) trying to run the pedal input from a cv sequencer.
>>
>> Can anyone clarify this?  I'll try to look up my old post later, but now
>> this has me curious about it.  I do remember making a "pedal" with a pot 
>> so
>> I could just turn a parameter in realtime so I know that part is true.
>>
>> ________________________________
>> From: zrennaya <zrennaya@...>
>> To: emax@yahoogroups.com
>> Sent: Friday, March 2, 2012 7:52 AM
>> Subject: [emax] Re: Emax pedal input and control voltages
>>
>>
>>
>>
>> Thanks jammie..again!
>>
>> So if I got you correctly, that particular ssm2300 has several channels
>> (I'm guessing 8), emax uses one for each of the onboard CV sources and if
>> they all work correctly it's only the pedal input channel that's messed 
>> up
>> and it splits its signal to the same output as the data slider for 
>> example,
>> plus the sampling itself is also messed up on that specific channel?
>>
>> And sample and hold in this case means it's a basic AD converter and on
>> the analog processing end there's a same basic DA one, right? I mean, the
>> onboard controls are pretty smooth considering that but do you think 
>> their
>> resolution is good enough for me to use an already D->A controller and go
>> A->D->A with them again? I'm talking about a higher-rate saw LFO.
>>
>> Thanks!
>>
>> --- In emax@yahoogroups.com, "jammie" <jammie.emma@...> wrote:
>> >
>> > ssm octal sample and hold ic is damaged
>> >
>> > ssm2300 exchange for a smp08 by analog devices its a pin for pin
>> replacement and has a better slew rate
>> >
>> > the pitch wheel the modulation wheel the volume slider and data slider
>> are cv sources the ssm2300 samples these and send the digital data to the
>> cpu which then processes the info and sends it to the smm2300 that out 
>> puts
>> the digital control data to a cv analog output for controlling the filter
>> or vca or panning
>> >
>> > you need to check the manual as i dont have it in front of me but 
>> > therte
>> are several ssm2300 octal sample and hold multiplexer ic
>> >
>> > you need to check the manual for the 1 that samples the voltages from
>> the controllers
>> > ----- Original Message -----
>> > From: zrennaya
>> > To: emax@yahoogroups.com
>> > Sent: Friday, March 02, 2012 11:48 AM
>> > Subject: [emax] Emax pedal input and control voltages
>> >
>> >
>> >
>> >
>> > Hi everybody!
>> >
>> > I have another issue with my Emax, I've tried to use a CV signal to
>> alter the filter cutoff -since there's only a sinewave internal LFO. The
>> manual says the pedal input receives standard CV signals but here's what 
>> it
>> does for me: even if the pedal input is not assigned to anything in 
>> preset
>> definition, when I send a CV signal, the display jumps around different
>> submenus, on the main page it jumps around presets and when the cursor is
>> on some parameter to adjust, it changes the values, so basically it does
>> the same job as the DATA slider.
>> >
>> > The other thing is, this is a MIDI controllable CV source, so MIDI CC
>> values 0->127 means -5V -> +5V control voltage and even if I try to
>> recalibrate the pedal input, when the cursor is over a parameter value,
>> when I turn the MIDI knob, there's no increment between cc values 0-51,
>> then some weird increment jumps between 52-59, then no increment between
>> 60-124, then major jump between 124-127.
>> > Consequently, when I assign the pedal input to the filter fc, the 
>> > cutoff
>> frequency is jumping around in the same fashion, while the submenus jump
>> around on the display at the same time.
>> > Could anyone please give me some advice, or knows wether I'm doing
>> something wrong or it's the emax's fault? Thanks a milion!!
>> >
>> >
>> >
>> >
>> >
>> > [Non-text portions of this message have been removed]
>> >
>>
>> [Non-text portions of this message have been removed]
>>
>>
>>
>
>
> [Non-text portions of this message have been removed]
>
>
>
> ------------------------------------
>
> Emax and Emax II User's Group Website
>
> http://www.silveriafamily.comYahoo! Groups Links
>
>
>

 From: jammie <jammie.emma@...>
To: emax@yahoogroups.com 
Sent: Friday, March 2, 2012 12:31 PM
Subject: Re: [emax] Re: Emax pedal input and control voltages
 

  
i thought that it was when using a pedal

if using another device to send cv into the pedal cv then you are asking for 
trouble its not that kind of cv

the cv from another device say modular synth will be ground and the cv 
voltage 0-10v

you will damage the cv circuit

if you want foot control from external device then just use midi

----- Original Message ----- 
From: "Ted Summers" <djtbs1@...>
To: <emax@yahoogroups.com>
Sent: Friday, March 02, 2012 4:54 PM
Subject: Re: [emax] Re: Emax pedal input and control voltages

> If I understand what was said, it was attempted to connect a different,
> external device (not a pedal) to send a control voltage onto one of the
> connections of the emax pedal input.
> If I am wrong in what my understanding is, then ignore this post....
>
> Well, this is quite simply, an electronics question.
>
> The Voltage is coming out of 1 contact, and is used as the reference by 
> the
> IC.
> As the wiper (pedal) is moved, it affects the return voltage in reference
> to the original voltage signal and (depending on the circuit) the
> difference to ground as well.
>
> To inject a signal from some other device I wouldn't expect that to
> necessarily work properly.
> There is no guarantee that the other device's reference ground plane is 
> the
> same.
> That scenario can create a difference in ground potential, a ground loop
> hum can result, bad value can result, etc.
>
> Is the other device using the same pin / connections for the ground and
> reference?
>
> If not, there is potential for damage of both units as well, since you
> could cause a short or overvoltage condition, exceeding the max voltage
> limits of the ICs...
>
> Just something to think about...
>
> Ted
>
>
>
>
>
>
>
> On Fri, Mar 2, 2012 at 8:30 AM, Chase Smith <plus_321@...> wrote:
>
>> **
>>
>>
>> My understanding is that the emax sends a cv out of the pedal input maybe
>> on the ring of a trs jack and that with the ground goes to the inputs on 
>> a
>> pot and the wiper output goes back in on the tip.  I think it expects you
>> to plug in a different type of pedal, than something that would just send 
>> a
>> cv.
>>
>> I've asked about this here before because I had a problem (this is with 
>> an
>> emax II) trying to run the pedal input from a cv sequencer.
>>
>> Can anyone clarify this?  I'll try to look up my old post later, but now
>> this has me curious about it.  I do remember making a "pedal" with a pot 
>> so
>> I could just turn a parameter in realtime so I know that part is true.
>>
>> ________________________________
>> From: zrennaya <zrennaya@...>
>> To: emax@yahoogroups.com
>> Sent: Friday, March 2, 2012 7:52 AM
>> Subject: [emax] Re: Emax pedal input and control voltages
>>
>>
>>
>>
>> Thanks jammie..again!
>>
>> So if I got you correctly, that particular ssm2300 has several channels
>> (I'm guessing 8), emax uses one for each of the onboard CV sources and if
>> they all work correctly it's only the pedal input channel that's messed 
>> up
>> and it splits its signal to the same output as the data slider for 
>> example,
>> plus the sampling itself is also messed up on that specific channel?
>>
>> And sample and hold in this case means it's a basic AD converter and on
>> the analog processing end there's a same basic DA one, right? I mean, the
>> onboard controls are pretty smooth considering that but do you think 
>> their
>> resolution is good enough for me to use an already D->A controller and go
>> A->D->A with them again? I'm talking about a higher-rate saw LFO.
>>
>> Thanks!
>>
>> --- In emax@yahoogroups.com, "jammie" <jammie.emma@...> wrote:
>> >
>> > ssm octal sample and hold ic is damaged
>> >
>> > ssm2300 exchange for a smp08 by analog devices its a pin for pin
>> replacement and has a better slew rate
>> >
>> > the pitch wheel the modulation wheel the volume slider and data slider
>> are cv sources the ssm2300 samples these and send the digital data to the
>> cpu which then processes the info and sends it to the smm2300 that out 
>> puts
>> the digital control data to a cv analog output for controlling the filter
>> or vca or panning
>> >
>> > you need to check the manual as i dont have it in front of me but 
>> > therte
>> are several ssm2300 octal sample and hold multiplexer ic
>> >
>> > you need to check the manual for the 1 that samples the voltages from
>> the controllers
>> > ----- Original Message -----
>> > From: zrennaya
>> > To: emax@yahoogroups.com
>> > Sent: Friday, March 02, 2012 11:48 AM
>> > Subject: [emax] Emax pedal input and control voltages
>> >
>> >
>> >
>> >
>> > Hi everybody!
>> >
>> > I have another issue with my Emax, I've tried to use a CV signal to
>> alter the filter cutoff -since there's only a sinewave internal LFO. The
>> manual says the pedal input receives standard CV signals but here's what 
>> it
>> does for me: even if the pedal input is not assigned to anything in 
>> preset
>> definition, when I send a CV signal, the display jumps around different
>> submenus, on the main page it jumps around presets and when the cursor is
>> on some parameter to adjust, it changes the values, so basically it does
>> the same job as the DATA slider.
>> >
>> > The other thing is, this is a MIDI controllable CV source, so MIDI CC
>> values 0->127 means -5V -> +5V control voltage and even if I try to
>> recalibrate the pedal input, when the cursor is over a parameter value,
>> when I turn the MIDI knob, there's no increment between cc values 0-51,
>> then some weird increment jumps between 52-59, then no increment between
>> 60-124, then major jump between 124-127.
>> > Consequently, when I assign the pedal input to the filter fc, the 
>> > cutoff
>> frequency is jumping around in the same fashion, while the submenus jump
>> around on the display at the same time.
>> > Could anyone please give me some advice, or knows wether I'm doing
>> something wrong or it's the emax's fault? Thanks a milion!!
>> >
>> >
>> >
>> >
>> >
>> > [Non-text portions of this message have been removed]
>> >
>>
>> [Non-text portions of this message have been removed]
>>
>>
>>
>
>
> [Non-text portions of this message have been removed]
>
>
>
> ------------------------------------
>
> Emax and Emax II User's Group Website
>
> http://www.silveriafamily.comYahoo! Groups Links
>
>
>


 

[Non-text portions of this message have been removed]

From: jammie.emma@blueyonder.co.uk
Date: Fri, 2 Mar 2012 17:31:44 +0000
Subject: Re: [emax] Re: Emax pedal input and control voltages


  



i thought that it was when using a pedal

if using another device to send cv into the pedal cv then you are asking for 
trouble its not that kind of cv

the cv from another device say modular synth will be ground and the cv 
voltage 0-10v

you will damage the cv circuit

if you want foot control from external device then just use midi

----- Original Message ----- 
From: "Ted Summers" <djtbs1@gmail.com>
To: <emax@yahoogroups.com>
Sent: Friday, March 02, 2012 4:54 PM
Subject: Re: [emax] Re: Emax pedal input and control voltages

> If I understand what was said, it was attempted to connect a different,
> external device (not a pedal) to send a control voltage onto one of the
> connections of the emax pedal input.
> If I am wrong in what my understanding is, then ignore this post....
>
> Well, this is quite simply, an electronics question.
>
> The Voltage is coming out of 1 contact, and is used as the reference by 
> the
> IC.
> As the wiper (pedal) is moved, it affects the return voltage in reference
> to the original voltage signal and (depending on the circuit) the
> difference to ground as well.
>
> To inject a signal from some other device I wouldn't expect that to
> necessarily work properly.
> There is no guarantee that the other device's reference ground plane is 
> the
> same.
> That scenario can create a difference in ground potential, a ground loop
> hum can result, bad value can result, etc.
>
> Is the other device using the same pin / connections for the ground and
> reference?
>
> If not, there is potential for damage of both units as well, since you
> could cause a short or overvoltage condition, exceeding the max voltage
> limits of the ICs...
>
> Just something to think about...
>
> Ted
>
>
>
>
>
>
>
> On Fri, Mar 2, 2012 at 8:30 AM, Chase Smith <plus_321@...> wrote:
>
>> **
>>
>>
>> My understanding is that the emax sends a cv out of the pedal input maybe
>> on the ring of a trs jack and that with the ground goes to the inputs on 
>> a
>> pot and the wiper output goes back in on the tip. I think it expects you
>> to plug in a different type of pedal, than something that would just send 
>> a
>> cv.
>>
>> I've asked about this here before because I had a problem (this is with 
>> an
>> emax II) trying to run the pedal input from a cv sequencer.
>>
>> Can anyone clarify this? I'll try to look up my old post later, but now
>> this has me curious about it. I do remember making a "pedal" with a pot 
>> so
>> I could just turn a parameter in realtime so I know that part is true.
>>
>> ________________________________
>> From: zrennaya <zrennaya@...>
>> To: emax@yahoogroups.com
>> Sent: Friday, March 2, 2012 7:52 AM
>> Subject: [emax] Re: Emax pedal input and control voltages
>>
>>
>>
>>
>> Thanks jammie..again!
>>
>> So if I got you correctly, that particular ssm2300 has several channels
>> (I'm guessing 8), emax uses one for each of the onboard CV sources and if
>> they all work correctly it's only the pedal input channel that's messed 
>> up
>> and it splits its signal to the same output as the data slider for 
>> example,
>> plus the sampling itself is also messed up on that specific channel?
>>
>> And sample and hold in this case means it's a basic AD converter and on
>> the analog processing end there's a same basic DA one, right? I mean, the
>> onboard controls are pretty smooth considering that but do you think 
>> their
>> resolution is good enough for me to use an already D->A controller and go
>> A->D->A with them again? I'm talking about a higher-rate saw LFO.
>>
>> Thanks!
>>
>> --- In emax@yahoogroups.com, "jammie" <jammie.emma@...> wrote:
>> >
>> > ssm octal sample and hold ic is damaged
>> >
>> > ssm2300 exchange for a smp08 by analog devices its a pin for pin
>> replacement and has a better slew rate
>> >
>> > the pitch wheel the modulation wheel the volume slider and data slider
>> are cv sources the ssm2300 samples these and send the digital data to the
>> cpu which then processes the info and sends it to the smm2300 that out 
>> puts
>> the digital control data to a cv analog output for controlling the filter
>> or vca or panning
>> >
>> > you need to check the manual as i dont have it in front of me but 
>> > therte
>> are several ssm2300 octal sample and hold multiplexer ic
>> >
>> > you need to check the manual for the 1 that samples the voltages from
>> the controllers
>> > ----- Original Message -----
>> > From: zrennaya
>> > To: emax@yahoogroups.com
>> > Sent: Friday, March 02, 2012 11:48 AM
>> > Subject: [emax] Emax pedal input and control voltages
>> >
>> >
>> >
>> >
>> > Hi everybody!
>> >
>> > I have another issue with my Emax, I've tried to use a CV signal to
>> alter the filter cutoff -since there's only a sinewave internal LFO. The
>> manual says the pedal input receives standard CV signals but here's what 
>> it
>> does for me: even if the pedal input is not assigned to anything in 
>> preset
>> definition, when I send a CV signal, the display jumps around different
>> submenus, on the main page it jumps around presets and when the cursor is
>> on some parameter to adjust, it changes the values, so basically it does
>> the same job as the DATA slider.
>> >
>> > The other thing is, this is a MIDI controllable CV source, so MIDI CC
>> values 0->127 means -5V -> +5V control voltage and even if I try to
>> recalibrate the pedal input, when the cursor is over a parameter value,
>> when I turn the MIDI knob, there's no increment between cc values 0-51,
>> then some weird increment jumps between 52-59, then no increment between
>> 60-124, then major jump between 124-127.
>> > Consequently, when I assign the pedal input to the filter fc, the 
>> > cutoff
>> frequency is jumping around in the same fashion, while the submenus jump
>> around on the display at the same time.
>> > Could anyone please give me some advice, or knows wether I'm doing
>> something wrong or it's the emax's fault? Thanks a milion!!
>> >
>> >
>> >
>> >
>> >
>> > [Non-text portions of this message have been removed]
>> >
>>
>> [Non-text portions of this message have been removed]
>>
>>
>>
>
>
> [Non-text portions of this message have been removed]
>
>
>
> ------------------------------------
>
> Emax and Emax II User's Group Website
>
> http://www.silveriafamily.comYahoo! Groups Links
>
>
>




 		 	   		  

[Non-text portions of this message have been removed]

>
> 
> The manual says the pedal takes 0-10 volts, so the problem is the negative voltage.
>  
> The service manual says you can input a voltage to the tip of the plug 0-9 volts, or it can be a fedal that varies resistance from the tip to ground.
>  
> try it with a voltage source that only goes 0-5 and see if the same trouble occurs.
>  
> 
>  
> 
> 
> 
> To: emax@yahoogroups.com
> From: jammie.emma@...
> Date: Fri, 2 Mar 2012 17:31:44 +0000
> Subject: Re: [emax] Re: Emax pedal input and control voltages
> 
> 
>   
> 
> 
> 
> i thought that it was when using a pedal
> 
> if using another device to send cv into the pedal cv then you are asking for 
> trouble its not that kind of cv
> 
> the cv from another device say modular synth will be ground and the cv 
> voltage 0-10v
> 
> you will damage the cv circuit
> 
> if you want foot control from external device then just use midi
> 
> ----- Original Message ----- 
> From: "Ted Summers" <djtbs1@...>
> To: <emax@yahoogroups.com>
> Sent: Friday, March 02, 2012 4:54 PM
> Subject: Re: [emax] Re: Emax pedal input and control voltages
> 
> > If I understand what was said, it was attempted to connect a different,
> > external device (not a pedal) to send a control voltage onto one of the
> > connections of the emax pedal input.
> > If I am wrong in what my understanding is, then ignore this post....
> >
> > Well, this is quite simply, an electronics question.
> >
> > The Voltage is coming out of 1 contact, and is used as the reference by 
> > the
> > IC.
> > As the wiper (pedal) is moved, it affects the return voltage in reference
> > to the original voltage signal and (depending on the circuit) the
> > difference to ground as well.
> >
> > To inject a signal from some other device I wouldn't expect that to
> > necessarily work properly.
> > There is no guarantee that the other device's reference ground plane is 
> > the
> > same.
> > That scenario can create a difference in ground potential, a ground loop
> > hum can result, bad value can result, etc.
> >
> > Is the other device using the same pin / connections for the ground and
> > reference?
> >
> > If not, there is potential for damage of both units as well, since you
> > could cause a short or overvoltage condition, exceeding the max voltage
> > limits of the ICs...
> >
> > Just something to think about...
> >
> > Ted
> >
> >
> >
> >
> >
> >
> >
> > On Fri, Mar 2, 2012 at 8:30 AM, Chase Smith <plus_321@...> wrote:
> >
> >> **
> >>
> >>
> >> My understanding is that the emax sends a cv out of the pedal input maybe
> >> on the ring of a trs jack and that with the ground goes to the inputs on 
> >> a
> >> pot and the wiper output goes back in on the tip. I think it expects you
> >> to plug in a different type of pedal, than something that would just send 
> >> a
> >> cv.
> >>
> >> I've asked about this here before because I had a problem (this is with 
> >> an
> >> emax II) trying to run the pedal input from a cv sequencer.
> >>
> >> Can anyone clarify this? I'll try to look up my old post later, but now
> >> this has me curious about it. I do remember making a "pedal" with a pot 
> >> so
> >> I could just turn a parameter in realtime so I know that part is true.
> >>
> >> ________________________________
> >> From: zrennaya <zrennaya@...>
> >> To: emax@yahoogroups.com
> >> Sent: Friday, March 2, 2012 7:52 AM
> >> Subject: [emax] Re: Emax pedal input and control voltages
> >>
> >>
> >>
> >>
> >> Thanks jammie..again!
> >>
> >> So if I got you correctly, that particular ssm2300 has several channels
> >> (I'm guessing 8), emax uses one for each of the onboard CV sources and if
> >> they all work correctly it's only the pedal input channel that's messed 
> >> up
> >> and it splits its signal to the same output as the data slider for 
> >> example,
> >> plus the sampling itself is also messed up on that specific channel?
> >>
> >> And sample and hold in this case means it's a basic AD converter and on
> >> the analog processing end there's a same basic DA one, right? I mean, the
> >> onboard controls are pretty smooth considering that but do you think 
> >> their
> >> resolution is good enough for me to use an already D->A controller and go
> >> A->D->A with them again? I'm talking about a higher-rate saw LFO.
> >>
> >> Thanks!
> >>
> >> --- In emax@yahoogroups.com, "jammie" <jammie.emma@> wrote:
> >> >
> >> > ssm octal sample and hold ic is damaged
> >> >
> >> > ssm2300 exchange for a smp08 by analog devices its a pin for pin
> >> replacement and has a better slew rate
> >> >
> >> > the pitch wheel the modulation wheel the volume slider and data slider
> >> are cv sources the ssm2300 samples these and send the digital data to the
> >> cpu which then processes the info and sends it to the smm2300 that out 
> >> puts
> >> the digital control data to a cv analog output for controlling the filter
> >> or vca or panning
> >> >
> >> > you need to check the manual as i dont have it in front of me but 
> >> > therte
> >> are several ssm2300 octal sample and hold multiplexer ic
> >> >
> >> > you need to check the manual for the 1 that samples the voltages from
> >> the controllers
> >> > ----- Original Message -----
> >> > From: zrennaya
> >> > To: emax@yahoogroups.com
> >> > Sent: Friday, March 02, 2012 11:48 AM
> >> > Subject: [emax] Emax pedal input and control voltages
> >> >
> >> >
> >> >
> >> >
> >> > Hi everybody!
> >> >
> >> > I have another issue with my Emax, I've tried to use a CV signal to
> >> alter the filter cutoff -since there's only a sinewave internal LFO. The
> >> manual says the pedal input receives standard CV signals but here's what 
> >> it
> >> does for me: even if the pedal input is not assigned to anything in 
> >> preset
> >> definition, when I send a CV signal, the display jumps around different
> >> submenus, on the main page it jumps around presets and when the cursor is
> >> on some parameter to adjust, it changes the values, so basically it does
> >> the same job as the DATA slider.
> >> >
> >> > The other thing is, this is a MIDI controllable CV source, so MIDI CC
> >> values 0->127 means -5V -> +5V control voltage and even if I try to
> >> recalibrate the pedal input, when the cursor is over a parameter value,
> >> when I turn the MIDI knob, there's no increment between cc values 0-51,
> >> then some weird increment jumps between 52-59, then no increment between
> >> 60-124, then major jump between 124-127.
> >> > Consequently, when I assign the pedal input to the filter fc, the 
> >> > cutoff
> >> frequency is jumping around in the same fashion, while the submenus jump
> >> around on the display at the same time.
> >> > Could anyone please give me some advice, or knows wether I'm doing
> >> something wrong or it's the emax's fault? Thanks a milion!!
> >> >
> >> >
> >> >
> >> >
> >> >
> >> > [Non-text portions of this message have been removed]
> >> >
> >>
> >> [Non-text portions of this message have been removed]
> >>
> >>
> >>
> >
> >
> > [Non-text portions of this message have been removed]
> >
> >
> >
> > ------------------------------------
> >
> > Emax and Emax II User's Group Website
> >
> > http://www.silveriafamily.comYahoo! Groups Links
> >
> >
> >
> 
> 
> 
> 
>  		 	   		  
> 
> [Non-text portions of this message have been removed]
>

>
> A little knowledge can be a dangerous thing.
> So you continue down this road of doing what is not recommended.
> I recommend you stop and get a meter before you burn something up.
> If you burn up the circuit or kill the Emax, don't come complaining!!!
> 
> Ted
> 
> 
> 
> On Fri, Mar 2, 2012 at 2:02 PM, zrennaya <zrennaya@...> wrote:
> 
> > **
> >
> >
> >
> > Okay I think I missed the 0-10V part in the manual...I checked now and
> > it's there, so my bad!
> >
> > So now I experimented with my CV source changing the gain on its DC opamp
> > and tried to stay on the positive voltage side. Unfortunately I don't have
> > a multimeter so I just checked the tolerance of the pedal input on the
> > recalibration page and I only used values between the two tolerance limits.
> >
> > When the recalibration asks for minimum value I can reach Pre:0999 Post:_
> > , if I go below that, that's where my CV signal starts to act like the DATA
> > slider. As for the maximum value, I can only do Pre:0927 Post:2.
> >
> > So I calibrated it to these values and if I don't let the CV source go
> > beyond the two limits it actually works, but the resolution is rather
> > steppy, I'm guessing it's because of the Pre:0999-0927 calibration. So my
> > external sine LFO is okay, ramp down is okay-ish but ramp up can only go up
> > to a certain rate, after that it disappears, I guess because the sample and
> > hold ic can't sample it anymore with this resolution.
> >
> > I checked the calibration of the right wheel and it goes from
> > Pre:0947Post: to Pre:0334Post:2 which seems to be a much higher resolution.
> > Actually this popped up another question: I calibrate the right wheel and
> > then I assign it to filter cutoff but it wouldn't open and close it all the
> > way! If I set the initial filter cutoff value in filter setup to 0, the
> > wheel's lowest position closes the filter all the way but it won't open it
> > all the way up at the highest position, I have to set the initial value to
> > around 40 and that's where it happens, but then it won't close it all the
> > way at the lowest position. Can anyone clue me in? Cheers
> >
> > Sorry for my grammar, I'm from eastern Europe..
> >
> >
> > --- In emax@yahoogroups.com, el macaco <elmacaco@> wrote:
> > >
> > >
> > > The manual says the pedal takes 0-10 volts, so the problem is the
> > negative voltage.
> > >
> > > The service manual says you can input a voltage to the tip of the plug
> > 0-9 volts, or it can be a fedal that varies resistance from the tip to
> > ground.
> > >
> > > try it with a voltage source that only goes 0-5 and see if the same
> > trouble occurs.
> > >
> > >
> > >
> > >
> > >
> > >
> > > To: emax@yahoogroups.com
> > > From: jammie.emma@
> >
> > > Date: Fri, 2 Mar 2012 17:31:44 +0000
> > > Subject: Re: [emax] Re: Emax pedal input and control voltages
> > >
> > >
> > >
> > >
> > >
> > >
> > > i thought that it was when using a pedal
> > >
> > > if using another device to send cv into the pedal cv then you are asking
> > for
> > > trouble its not that kind of cv
> > >
> > > the cv from another device say modular synth will be ground and the cv
> > > voltage 0-10v
> > >
> > > you will damage the cv circuit
> > >
> > > if you want foot control from external device then just use midi
> > >
> > > ----- Original Message -----
> > > From: "Ted Summers" <djtbs1@>
> > > To: <emax@yahoogroups.com>
> > > Sent: Friday, March 02, 2012 4:54 PM
> > > Subject: Re: [emax] Re: Emax pedal input and control voltages
> > >
> > > > If I understand what was said, it was attempted to connect a different,
> > > > external device (not a pedal) to send a control voltage onto one of the
> > > > connections of the emax pedal input.
> > > > If I am wrong in what my understanding is, then ignore this post....
> > > >
> > > > Well, this is quite simply, an electronics question.
> > > >
> > > > The Voltage is coming out of 1 contact, and is used as the reference
> > by
> > > > the
> > > > IC.
> > > > As the wiper (pedal) is moved, it affects the return voltage in
> > reference
> > > > to the original voltage signal and (depending on the circuit) the
> > > > difference to ground as well.
> > > >
> > > > To inject a signal from some other device I wouldn't expect that to
> > > > necessarily work properly.
> > > > There is no guarantee that the other device's reference ground plane
> > is
> > > > the
> > > > same.
> > > > That scenario can create a difference in ground potential, a ground
> > loop
> > > > hum can result, bad value can result, etc.
> > > >
> > > > Is the other device using the same pin / connections for the ground and
> > > > reference?
> > > >
> > > > If not, there is potential for damage of both units as well, since you
> > > > could cause a short or overvoltage condition, exceeding the max voltage
> > > > limits of the ICs...
> > > >
> > > > Just something to think about...
> > > >
> > > > Ted
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > On Fri, Mar 2, 2012 at 8:30 AM, Chase Smith <plus_321@> wrote:
> > > >
> > > >> **
> > > >>
> > > >>
> > > >> My understanding is that the emax sends a cv out of the pedal input
> > maybe
> > > >> on the ring of a trs jack and that with the ground goes to the inputs
> > on
> > > >> a
> > > >> pot and the wiper output goes back in on the tip. I think it expects
> > you
> > > >> to plug in a different type of pedal, than something that would just
> > send
> > > >> a
> > > >> cv.
> > > >>
> > > >> I've asked about this here before because I had a problem (this is
> > with
> > > >> an
> > > >> emax II) trying to run the pedal input from a cv sequencer.
> > > >>
> > > >> Can anyone clarify this? I'll try to look up my old post later, but
> > now
> > > >> this has me curious about it. I do remember making a "pedal" with a
> > pot
> > > >> so
> > > >> I could just turn a parameter in realtime so I know that part is true.
> > > >>
> > > >> ________________________________
> > > >> From: zrennaya <zrennaya@>
> >
> > > >> To: emax@yahoogroups.com
> > > >> Sent: Friday, March 2, 2012 7:52 AM
> > > >> Subject: [emax] Re: Emax pedal input and control voltages
> > > >>
> > > >>
> > > >>
> > > >>
> > > >> Thanks jammie..again!
> > > >>
> > > >> So if I got you correctly, that particular ssm2300 has several
> > channels
> > > >> (I'm guessing 8), emax uses one for each of the onboard CV sources
> > and if
> > > >> they all work correctly it's only the pedal input channel that's
> > messed
> > > >> up
> > > >> and it splits its signal to the same output as the data slider for
> > > >> example,
> > > >> plus the sampling itself is also messed up on that specific channel?
> > > >>
> > > >> And sample and hold in this case means it's a basic AD converter and
> > on
> > > >> the analog processing end there's a same basic DA one, right? I mean,
> > the
> > > >> onboard controls are pretty smooth considering that but do you think
> > > >> their
> > > >> resolution is good enough for me to use an already D->A controller
> > and go
> > > >> A->D->A with them again? I'm talking about a higher-rate saw LFO.
> > > >>
> > > >> Thanks!
> > > >>
> > > >> --- In emax@yahoogroups.com, "jammie" <jammie.emma@> wrote:
> > > >> >
> > > >> > ssm octal sample and hold ic is damaged
> > > >> >
> > > >> > ssm2300 exchange for a smp08 by analog devices its a pin for pin
> > > >> replacement and has a better slew rate
> > > >> >
> > > >> > the pitch wheel the modulation wheel the volume slider and data
> > slider
> > > >> are cv sources the ssm2300 samples these and send the digital data to
> > the
> > > >> cpu which then processes the info and sends it to the smm2300 that
> > out
> > > >> puts
> > > >> the digital control data to a cv analog output for controlling the
> > filter
> > > >> or vca or panning
> > > >> >
> > > >> > you need to check the manual as i dont have it in front of me but
> > > >> > therte
> > > >> are several ssm2300 octal sample and hold multiplexer ic
> > > >> >
> > > >> > you need to check the manual for the 1 that samples the voltages
> > from
> > > >> the controllers
> > > >> > ----- Original Message -----
> > > >> > From: zrennaya
> > > >> > To: emax@yahoogroups.com
> > > >> > Sent: Friday, March 02, 2012 11:48 AM
> > > >> > Subject: [emax] Emax pedal input and control voltages
> > > >> >
> > > >> >
> > > >> >
> > > >> >
> > > >> > Hi everybody!
> > > >> >
> > > >> > I have another issue with my Emax, I've tried to use a CV signal to
> > > >> alter the filter cutoff -since there's only a sinewave internal LFO.
> > The
> > > >> manual says the pedal input receives standard CV signals but here's
> > what
> > > >> it
> > > >> does for me: even if the pedal input is not assigned to anything in
> > > >> preset
> > > >> definition, when I send a CV signal, the display jumps around
> > different
> > > >> submenus, on the main page it jumps around presets and when the
> > cursor is
> > > >> on some parameter to adjust, it changes the values, so basically it
> > does
> > > >> the same job as the DATA slider.
> > > >> >
> > > >> > The other thing is, this is a MIDI controllable CV source, so MIDI
> > CC
> > > >> values 0->127 means -5V -> +5V control voltage and even if I try to
> > > >> recalibrate the pedal input, when the cursor is over a parameter
> > value,
> > > >> when I turn the MIDI knob, there's no increment between cc values
> > 0-51,
> > > >> then some weird increment jumps between 52-59, then no increment
> > between
> > > >> 60-124, then major jump between 124-127.
> > > >> > Consequently, when I assign the pedal input to the filter fc, the
> > > >> > cutoff
> > > >> frequency is jumping around in the same fashion, while the submenus
> > jump
> > > >> around on the display at the same time.
> > > >> > Could anyone please give me some advice, or knows wether I'm doing
> > > >> something wrong or it's the emax's fault? Thanks a milion!!
> > > >> >
> > > >> >
> > > >> >
> > > >> >
> > > >> >
> > > >> > [Non-text portions of this message have been removed]
> > > >> >
> > > >>
> > > >> [Non-text portions of this message have been removed]
> > > >>
> > > >>
> > > >>
> > > >
> > > >
> > > > [Non-text portions of this message have been removed]
> > > >
> > > >
> > > >
> > > > ------------------------------------
> > > >
> > > > Emax and Emax II User's Group Website
> > > >
> > > > http://www.silveriafamily.comYahoo! Groups Links
> > > >
> > > >
> > > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > [Non-text portions of this message have been removed]
> > >
> >
> >  
> >
> 
> 
> [Non-text portions of this message have been removed]
>

  ----- Original Message ----- 
  From: zrennaya 
  To: emax@yahoogroups.com 
  Sent: Friday, March 02, 2012 10:43 PM
  Subject: [emax] Re: Emax pedal input and control voltages


    
  You're right Ted, I think I'm better off without this whole CV thing.
  I only came this far because I read in the manual that it's supposed to accept any CV source between 0-10V so i figured the ground as reference (if I understood you guys correctly) might not be the issue, since I got it to work -sort of. Still, why would the manual claim ANY cv source and not say a thing about this issue.. nevermind, after I heard the the different LFOs with the internal filters I wasn't so impressed as to continue down this road. I have an external MS-20 filter which I find better sounding anyway! 

  So thanks for all the advice and if you could elaborate on this modwheel thing I'd be really grateful! 

  Cheers!

  --- In emax@yahoogroups.com, Ted Summers <djtbs1@...> wrote:
  >
  > A little knowledge can be a dangerous thing.
  > So you continue down this road of doing what is not recommended.
  > I recommend you stop and get a meter before you burn something up.
  > If you burn up the circuit or kill the Emax, don't come complaining!!!
  > 
  > Ted
  > 
  > 
  > 
  > On Fri, Mar 2, 2012 at 2:02 PM, zrennaya <zrennaya@...> wrote:
  > 
  > > **
  > >
  > >
  > >
  > > Okay I think I missed the 0-10V part in the manual...I checked now and
  > > it's there, so my bad!
  > >
  > > So now I experimented with my CV source changing the gain on its DC opamp
  > > and tried to stay on the positive voltage side. Unfortunately I don't have
  > > a multimeter so I just checked the tolerance of the pedal input on the
  > > recalibration page and I only used values between the two tolerance limits.
  > >
  > > When the recalibration asks for minimum value I can reach Pre:0999 Post:_
  > > , if I go below that, that's where my CV signal starts to act like the DATA
  > > slider. As for the maximum value, I can only do Pre:0927 Post:2.
  > >
  > > So I calibrated it to these values and if I don't let the CV source go
  > > beyond the two limits it actually works, but the resolution is rather
  > > steppy, I'm guessing it's because of the Pre:0999-0927 calibration. So my
  > > external sine LFO is okay, ramp down is okay-ish but ramp up can only go up
  > > to a certain rate, after that it disappears, I guess because the sample and
  > > hold ic can't sample it anymore with this resolution.
  > >
  > > I checked the calibration of the right wheel and it goes from
  > > Pre:0947Post: to Pre:0334Post:2 which seems to be a much higher resolution.
  > > Actually this popped up another question: I calibrate the right wheel and
  > > then I assign it to filter cutoff but it wouldn't open and close it all the
  > > way! If I set the initial filter cutoff value in filter setup to 0, the
  > > wheel's lowest position closes the filter all the way but it won't open it
  > > all the way up at the highest position, I have to set the initial value to
  > > around 40 and that's where it happens, but then it won't close it all the
  > > way at the lowest position. Can anyone clue me in? Cheers
  > >
  > > Sorry for my grammar, I'm from eastern Europe..
  > >
  > >
  > > --- In emax@yahoogroups.com, el macaco <elmacaco@> wrote:
  > > >
  > > >
  > > > The manual says the pedal takes 0-10 volts, so the problem is the
  > > negative voltage.
  > > >
  > > > The service manual says you can input a voltage to the tip of the plug
  > > 0-9 volts, or it can be a fedal that varies resistance from the tip to
  > > ground.
  > > >
  > > > try it with a voltage source that only goes 0-5 and see if the same
  > > trouble occurs.
  > > >
  > > >
  > > >
  > > >
  > > >
  > > >
  > > > To: emax@yahoogroups.com
  > > > From: jammie.emma@
  > >
  > > > Date: Fri, 2 Mar 2012 17:31:44 +0000
  > > > Subject: Re: [emax] Re: Emax pedal input and control voltages
  > > >
  > > >
  > > >
  > > >
  > > >
  > > >
  > > > i thought that it was when using a pedal
  > > >
  > > > if using another device to send cv into the pedal cv then you are asking
  > > for
  > > > trouble its not that kind of cv
  > > >
  > > > the cv from another device say modular synth will be ground and the cv
  > > > voltage 0-10v
  > > >
  > > > you will damage the cv circuit
  > > >
  > > > if you want foot control from external device then just use midi
  > > >
  > > > ----- Original Message -----
  > > > From: "Ted Summers" <djtbs1@>
  > > > To: <emax@yahoogroups.com>
  > > > Sent: Friday, March 02, 2012 4:54 PM
  > > > Subject: Re: [emax] Re: Emax pedal input and control voltages
  > > >
  > > > > If I understand what was said, it was attempted to connect a different,
  > > > > external device (not a pedal) to send a control voltage onto one of the
  > > > > connections of the emax pedal input.
  > > > > If I am wrong in what my understanding is, then ignore this post....
  > > > >
  > > > > Well, this is quite simply, an electronics question.
  > > > >
  > > > > The Voltage is coming out of 1 contact, and is used as the reference
  > > by
  > > > > the
  > > > > IC.
  > > > > As the wiper (pedal) is moved, it affects the return voltage in
  > > reference
  > > > > to the original voltage signal and (depending on the circuit) the
  > > > > difference to ground as well.
  > > > >
  > > > > To inject a signal from some other device I wouldn't expect that to
  > > > > necessarily work properly.
  > > > > There is no guarantee that the other device's reference ground plane
  > > is
  > > > > the
  > > > > same.
  > > > > That scenario can create a difference in ground potential, a ground
  > > loop
  > > > > hum can result, bad value can result, etc.
  > > > >
  > > > > Is the other device using the same pin / connections for the ground and
  > > > > reference?
  > > > >
  > > > > If not, there is potential for damage of both units as well, since you
  > > > > could cause a short or overvoltage condition, exceeding the max voltage
  > > > > limits of the ICs...
  > > > >
  > > > > Just something to think about...
  > > > >
  > > > > Ted
  > > > >
  > > > >
  > > > >
  > > > >
  > > > >
  > > > >
  > > > >
  > > > > On Fri, Mar 2, 2012 at 8:30 AM, Chase Smith <plus_321@> wrote:
  > > > >
  > > > >> **
  > > > >>
  > > > >>
  > > > >> My understanding is that the emax sends a cv out of the pedal input
  > > maybe
  > > > >> on the ring of a trs jack and that with the ground goes to the inputs
  > > on
  > > > >> a
  > > > >> pot and the wiper output goes back in on the tip. I think it expects
  > > you
  > > > >> to plug in a different type of pedal, than something that would just
  > > send
  > > > >> a
  > > > >> cv.
  > > > >>
  > > > >> I've asked about this here before because I had a problem (this is
  > > with
  > > > >> an
  > > > >> emax II) trying to run the pedal input from a cv sequencer.
  > > > >>
  > > > >> Can anyone clarify this? I'll try to look up my old post later, but
  > > now
  > > > >> this has me curious about it. I do remember making a "pedal" with a
  > > pot
  > > > >> so
  > > > >> I could just turn a parameter in realtime so I know that part is true.
  > > > >>
  > > > >> ________________________________
  > > > >> From: zrennaya <zrennaya@>
  > >
  > > > >> To: emax@yahoogroups.com
  > > > >> Sent: Friday, March 2, 2012 7:52 AM
  > > > >> Subject: [emax] Re: Emax pedal input and control voltages
  > > > >>
  > > > >>
  > > > >>
  > > > >>
  > > > >> Thanks jammie..again!
  > > > >>
  > > > >> So if I got you correctly, that particular ssm2300 has several
  > > channels
  > > > >> (I'm guessing 8), emax uses one for each of the onboard CV sources
  > > and if
  > > > >> they all work correctly it's only the pedal input channel that's
  > > messed
  > > > >> up
  > > > >> and it splits its signal to the same output as the data slider for
  > > > >> example,
  > > > >> plus the sampling itself is also messed up on that specific channel?
  > > > >>
  > > > >> And sample and hold in this case means it's a basic AD converter and
  > > on
  > > > >> the analog processing end there's a same basic DA one, right? I mean,
  > > the
  > > > >> onboard controls are pretty smooth considering that but do you think
  > > > >> their
  > > > >> resolution is good enough for me to use an already D->A controller
  > > and go
  > > > >> A->D->A with them again? I'm talking about a higher-rate saw LFO.
  > > > >>
  > > > >> Thanks!
  > > > >>
  > > > >> --- In emax@yahoogroups.com, "jammie" <jammie.emma@> wrote:
  > > > >> >
  > > > >> > ssm octal sample and hold ic is damaged
  > > > >> >
  > > > >> > ssm2300 exchange for a smp08 by analog devices its a pin for pin
  > > > >> replacement and has a better slew rate
  > > > >> >
  > > > >> > the pitch wheel the modulation wheel the volume slider and data
  > > slider
  > > > >> are cv sources the ssm2300 samples these and send the digital data to
  > > the
  > > > >> cpu which then processes the info and sends it to the smm2300 that
  > > out
  > > > >> puts
  > > > >> the digital control data to a cv analog output for controlling the
  > > filter
  > > > >> or vca or panning
  > > > >> >
  > > > >> > you need to check the manual as i dont have it in front of me but
  > > > >> > therte
  > > > >> are several ssm2300 octal sample and hold multiplexer ic
  > > > >> >
  > > > >> > you need to check the manual for the 1 that samples the voltages
  > > from
  > > > >> the controllers
  > > > >> > ----- Original Message -----
  > > > >> > From: zrennaya
  > > > >> > To: emax@yahoogroups.com
  > > > >> > Sent: Friday, March 02, 2012 11:48 AM
  > > > >> > Subject: [emax] Emax pedal input and control voltages
  > > > >> >
  > > > >> >
  > > > >> >
  > > > >> >
  > > > >> > Hi everybody!
  > > > >> >
  > > > >> > I have another issue with my Emax, I've tried to use a CV signal to
  > > > >> alter the filter cutoff -since there's only a sinewave internal LFO.
  > > The
  > > > >> manual says the pedal input receives standard CV signals but here's
  > > what
  > > > >> it
  > > > >> does for me: even if the pedal input is not assigned to anything in
  > > > >> preset
  > > > >> definition, when I send a CV signal, the display jumps around
  > > different
  > > > >> submenus, on the main page it jumps around presets and when the
  > > cursor is
  > > > >> on some parameter to adjust, it changes the values, so basically it
  > > does
  > > > >> the same job as the DATA slider.
  > > > >> >
  > > > >> > The other thing is, this is a MIDI controllable CV source, so MIDI
  > > CC
  > > > >> values 0->127 means -5V -> +5V control voltage and even if I try to
  > > > >> recalibrate the pedal input, when the cursor is over a parameter
  > > value,
  > > > >> when I turn the MIDI knob, there's no increment between cc values
  > > 0-51,
  > > > >> then some weird increment jumps between 52-59, then no increment
  > > between
  > > > >> 60-124, then major jump between 124-127.
  > > > >> > Consequently, when I assign the pedal input to the filter fc, the
  > > > >> > cutoff
  > > > >> frequency is jumping around in the same fashion, while the submenus
  > > jump
  > > > >> around on the display at the same time.
  > > > >> > Could anyone please give me some advice, or knows wether I'm doing
  > > > >> something wrong or it's the emax's fault? Thanks a milion!!
  > > > >> >
  > > > >> >
  > > > >> >
  > > > >> >
  > > > >> >
  > > > >> > [Non-text portions of this message have been removed]
  > > > >> >
  > > > >>
  > > > >> [Non-text portions of this message have been removed]
  > > > >>
  > > > >>
  > > > >>
  > > > >
  > > > >
  > > > > [Non-text portions of this message have been removed]
  > > > >
  > > > >
  > > > >
  > > > > ------------------------------------
  > > > >
  > > > > Emax and Emax II User's Group Website
  > > > >
  > > > > http://www.silveriafamily.comYahoo! Groups Links
  > > > >
  > > > >
  > > > >
  > > >
  > > >
  > > >
  > > >
  > > >
  > > >
  > > > [Non-text portions of this message have been removed]
  > > >
  > >
  > > 
  > >
  > 
  > 
  > [Non-text portions of this message have been removed]
  >



  

[Non-text portions of this message have been removed]

>
> 
> Hi everybody!
> 
> I have another issue with my Emax, I've tried to use a CV signal to alter the filter cutoff -since there's only a sinewave internal LFO. The manual says the pedal input receives standard CV signals but here's what it does for me: even if the pedal input is not assigned to anything in preset definition, when I send a CV signal, the display jumps around different submenus, on the main page it jumps around presets and when the cursor is on some parameter to adjust, it changes the values, so basically it does the same job as the DATA slider. 
> 
>  The other thing is, this is a MIDI controllable CV source, so MIDI CC values 0->127 means -5V -> +5V control voltage and even if I try to recalibrate the pedal input, when the cursor is over a parameter value, when I turn the MIDI knob, there's no increment between cc values 0-51, then some weird increment jumps between 52-59, then no increment between 60-124, then major jump between 124-127.
>  Consequently, when I assign the pedal input to the filter fc, the cutoff frequency is jumping around in the same fashion, while the submenus jump around on the display at the same time.
>  Could anyone please give me some advice, or knows wether I'm doing something wrong or it's the emax's fault? Thanks a milion!!
>

>
> One of my "interesting" memories with my emax...when it was relatively new (pre-SE, pre-HD), I turned it on and all audio-hell broke loose—had to scramble to turn down my mixer. It had worked before so I thought about what had changed—disconnected the (sustain) pedal and powered it back up—everything's fine. Plugged the pedal back in and it's fine. But power it up with the pedal in—loud, horrible noises (sadly, not musical ones, or even interesting ones). They had just done an OS rev that was smart about sensing the pedal—it would take either a normally-open or normally-closed pedal, sensing the orientation when you plugged it in. Runs in my mind I was using a yamaha pedal that was normally closed (from DX7?). I reasoned that they had neglected to test that type of pedal when it's already connected at power-up. I called them, and sure enough they had no idea—but thanked me for figuring it out, and fixed it in the next rev!
> 
> 
> 
> --- In emax@yahoogroups.com, "zrennaya" <zrennaya@> wrote:
> >
> > 
> > Hi everybody!
> > 
> > I have another issue with my Emax, I've tried to use a CV signal to alter the filter cutoff -since there's only a sinewave internal LFO. The manual says the pedal input receives standard CV signals but here's what it does for me: even if the pedal input is not assigned to anything in preset definition, when I send a CV signal, the display jumps around different submenus, on the main page it jumps around presets and when the cursor is on some parameter to adjust, it changes the values, so basically it does the same job as the DATA slider. 
> > 
> >  The other thing is, this is a MIDI controllable CV source, so MIDI CC values 0->127 means -5V -> +5V control voltage and even if I try to recalibrate the pedal input, when the cursor is over a parameter value, when I turn the MIDI knob, there's no increment between cc values 0-51, then some weird increment jumps between 52-59, then no increment between 60-124, then major jump between 124-127.
> >  Consequently, when I assign the pedal input to the filter fc, the cutoff frequency is jumping around in the same fashion, while the submenus jump around on the display at the same time.
> >  Could anyone please give me some advice, or knows wether I'm doing something wrong or it's the emax's fault? Thanks a milion!!
> >
>

>
> A "CV Pedal Input" is not a CV Control Voltage input!
> I don t think the emax will like to receive +/- 5 Volt there...
> 
> A standard CV Pedal is a "Trim Pot" !
> I once converted an old Analog Joystick by ripping out all the electronic except the trimpots to a "dual CV Pedal". It connects well to the CV Input of Synthesizers.