Emax

usually the cv pedal gets its voltage from the emax 

usually its 0-10vdc for a cv pedal this gets sampled by the multiplexer then it will go to the uart which is comunicating with the cpu this is becuase the uart will deal with the midi control of the cv input as well as the cv pedal input as both send the same data 

if you where using an external keyboard with a footpedal the footpedal cv of the keyboard controller would send the footpedal midi messages over midi

volume cv foot control is midi 7

data entry midi control is midi 6

have you tried doing it over midi from a sequencer to see if it does the same problem

plus there are different types of foot controls

i know you have to use certain types with ensoniq keyboards  might be the same with the emax 

what does the manual say as it tells you which should be the wiper
  ----- 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!!
  > 
  > 
  > 
  > 
  > 
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  >

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