Doepfer

> ----- Original Message ----- 
> From: Dieter Doepfer 
> To: bakis sirros 
> Sent: Wednesday, December 18, 2002 1:30 PM
> Subject: AW: about the a130,a131,a132
> 
> 
> 
> The reason for the differences of the AC/DC
> processing are the integrated circuits used in the
> different VCAs (e.g. the Curtis/CEM chips CEM3381
> and CEM3382 cannot be used for DC signals):
> 
> A-130 and A-131 (old production series with
> CEM3381/CEM3382): no DC processing possible
> A-130 and A-132 (new production series with CA3080):
> DC processing possible
> A-132: DC processing possible
> A-134: no DC processing possible (CEM3381 used)
> A-135: no DC processing possible (CEM3381 used)
> A-136: DC processing depends upon the jumper setting
> of JP2. JP2 is close to the first potentiometer. If
> installed: DC processing possible (is short-circuit
> of the AC coupling capacitor)
> A-138a/b: DC processing possible
> A-116: no DC processing possible (AC coupling
> capacitors in both input and output circuit, if both
> are shortened DC processing should work)
> A-129-3: DC processing possible
> 
> 
> Latest news: A-154 prototype is working now. But we
> are not sure for some features:
>   a.. Should the internal clock generator stop in
> stop mode or continue clock generation in stop mode
> ? The advantage is continuos clock is that one could
> adjust the clock speed in advance (LED display of
> clock). The advantage of stopping clock is that the
> clock would exactly in sync when start is triggered
>   b.. Should the one shot modes even be possible for
> random and CV adressed mode and if applicable how it
> should work (e.g. for random: random steps until the
> last step is adressed, then it stops, the number of
> steps that occur in one shot random mode cannot be
> predicted, same for CV adressed mode, i.e. CV
> adressing as normal until last step is adressed,
> then it stops)
> Because many customers suggested this: we will
> probably develop another low pass filter based on
> SSM2044 (used e.g. in Polysix and other Korgs, PPG,
> Siel and so on). For all "complaints" about this
> additional filter: customers want to have this
> filter, it's not our idea. One customer even agreed
> to purchase 100 SSM2044 or more in advance for us if
> we promise that we will offer a SSM2044 filter.
> 
> We will built a prototype of the recommended CV
> input expander (5 input sockets with attenuators
> that can be used to expand the number in CV inputs
> e.g. for filter frequency, via jumpers the 5 inputs
> can be combined in different ways, e.g. 3 + 2 or 1 +
> 4 or all 5 together). The inquiries/advance orders
> for this CV input expander will decide if this
> module will go into production. Suggested module
> number: A-137 (as it is nearly the same as the A-138
> but without the active amplifiers of the A-138, so
> the price will be nearly the same as for the A-138).
> 
> Kind regards
> Dieter Doepfer
> Doepfer Musikelektronik GmbH
> http://www.doepfer.de
> email: hardware@doepfer.de
> 
> Because of Christmas holidays and stock keeping our
> company is closed from December 20, 2002 until
> January 06, 2003.


 


=====
synthfreak(parallel worlds)
athens-greece
[Doepfer_a100] group owner-moderator

__________________________________________________
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--- In Doepfer_a100@yahoogroups.com, bakis Sirros 
<synth_freak_2000@y...> wrote:
> 
> > ----- Original Message ----- 
> > From: Dieter Doepfer 
> > To: bakis sirros 
> > Sent: Wednesday, December 18, 2002 1:30 PM
> > Subject: AW: about the a130,a131,a132

> > Latest news: A-154 prototype is working now. But we
> > are not sure for some features:
> >   a.. Should the internal clock generator stop in
> > stop mode or continue clock generation in stop mode
> > ? 

Personally, i think it should be able to continue and you should have 
tthe option to do both, i.e. voltage control of the master clock, 
which is already there and the ability to select which A155 you wish 
to stop start while having sync and the ability to resync. a couple 
reasons.

1) since it is the master clock for 1 or 2 A155, if you stop the 
clock then both A155 stop. now if doesn't stop the clock , one or the 
A155 can continue.

it would be best if there was a way to individually stop one or and  
or both of the A155's from the A154. for this to happen, you would 
need 2 toggle switches for both of the A155's and maybe a couple of 
extra inputs to for VC. the switch should be designated, bottom 
position is momentary to sync the a155's to the current position of 
the other A155 if it is 2x8 mode, middle position is the on positon  
and the top position is an off position.

2) it could clock other sequencers , EG's, pulse dividers etc. 


The advantage is continuos clock is that one could
> > adjust the clock speed in advance (LED display of
> > clock). The advantage of stopping clock is that the
> > clock would exactly in sync when start is triggered
> >   b.. Should the one shot modes even be possible for
> > random and CV adressed mode and if applicable how it
> > should work (e.g. for random: random steps until the
> > last step is adressed, then it stops, the number of
> > steps that occur in one shot random mode cannot be
> > predicted, same for CV adressed mode, i.e. CV
> > adressing as normal until last step is adressed,
> > then it stops)

i think the option for both would be great.

 again a toggle switch to set the parameters for the one shot mode. 
down position for random steps until the last step is adressed. 
middle position the number of steps that occur in one shot random 
mode cannot be predicted. up position for the number of steps 
selected i.e.
2 x 8 after 8 steps regardless of which steps were randomly selected, 
the one shot ends and waits for a trigger or reset trigger, same goes 
for the 16 step mode.

it is better to have the options now, then saying i wished they had 
done them. we are talking about a serious control module here.

 

> > Because many customers suggested this: we will
> > probably develop another low pass filter based on
> > SSM2044 (used e.g. in Polysix and other Korgs, PPG,
> > Siel and so on). For all "complaints" about this
> > additional filter: customers want to have this
> > filter, it's not our idea. One customer even agreed
> > to purchase 100 SSM2044 or more in advance for us if
> > we promise that we will offer a SSM2044 filter.

I like the idea of an ssm based filter, but it would nice if you 
could add new features to it so does new types of filtering and not 
just imitate those filters. just asking.

here goes a couple of stupid questions, would it be possible to have 
4 separate slopes? or vc variable slopes? could you also have a high 
pass version?

RM

> > 
> > We will built a prototype of the recommended CV
> > input expander (5 input sockets with attenuators
> > that can be used to expand the number in CV inputs
> > e.g. for filter frequency, via jumpers the 5 inputs
> > can be combined in different ways, e.g. 3 + 2 or 1 +
> > 4 or all 5 together). The inquiries/advance orders
> > for this CV input expander will decide if this
> > module will go into production. Suggested module
> > number: A-137 (as it is nearly the same as the A-138
> > but without the active amplifiers of the A-138, so
> > the price will be nearly the same as for the A-138).
> > 
> > Kind regards
> > Dieter Doepfer
> > Doepfer Musikelektronik GmbH
> > http://www.doepfer.de
> > email: hardware@d...
> > 
> > Because of Christmas holidays and stock keeping our
> > company is closed from December 20, 2002 until
> > January 06, 2003.
> 
> 
>  
> 
> 
> =====
> synthfreak(parallel worlds)
> athens-greece
> [Doepfer_a100] group owner-moderator
> 
> __________________________________________________
> Do you Yahoo!?
> Yahoo! Mail Plus - Powerful. Affordable. Sign up now.
> http://mailplus.yahoo.com

yes, what RM said.  now that clock options are mentioned, why 
not both?   i imagine the 154 will find itself running along side 
pairs of 155s for many users, me for one.  so maximum flexibility 
w two 155s will hopefully be well researched.  

an on/off toggle switch w momentary sync position for each 155 
would be very useful.  be nice to hit the brakes on one 155, or 
allow one to step out of order while the other runs in order, with 
the ability to resync.   

also, i think RM's suggestion for cv slope control could be a 
deciding factor for me in buying 'yet another filter'.   would beat 
having to buy 2 extra modules for morphing slope (a la 108).

-psm




--- In Doepfer_a100@yahoogroups.com, "ringmod45 
<ringmod45@y...>" <ringmod45@y...> wrote:
> --- In Doepfer_a100@yahoogroups.com, bakis Sirros 
> <synth_freak_2000@y...> wrote:
> > 
> > > ----- Original Message ----- 
> > > From: Dieter Doepfer 
> > > To: bakis sirros 
> > > Sent: Wednesday, December 18, 2002 1:30 PM
> > > Subject: AW: about the a130,a131,a132
> 
> > > Latest news: A-154 prototype is working now. But we
> > > are not sure for some features:
> > >   a.. Should the internal clock generator stop in
> > > stop mode or continue clock generation in stop mode
> > > ? 
> 
> Personally, i think it should be able to continue and you should 
have 
> tthe option to do both, i.e. voltage control of the master clock, 
> which is already there and the ability to select which A155 you 
wish 
> to stop start while having sync and the ability to resync. a 
couple 
> reasons.
> 
> 1) since it is the master clock for 1 or 2 A155, if you stop the 
> clock then both A155 stop. now if doesn't stop the clock , one or 
the 
> A155 can continue.
> 
> it would be best if there was a way to individually stop one or 
and  
> or both of the A155's from the A154. for this to happen, you 
would 
> need 2 toggle switches for both of the A155's and maybe a 
couple of 
> extra inputs to for VC. the switch should be designated, bottom 
> position is momentary to sync the a155's to the current 
position of 
> the other A155 if it is 2x8 mode, middle position is the on 
positon  
> and the top position is an off position.
> 
> 2) it could clock other sequencers , EG's, pulse dividers etc. 
> 
> 
> The advantage is continuos clock is that one could
> > > adjust the clock speed in advance (LED display of
> > > clock). The advantage of stopping clock is that the
> > > clock would exactly in sync when start is triggered
> > >   b.. Should the one shot modes even be possible for
> > > random and CV adressed mode and if applicable how it
> > > should work (e.g. for random: random steps until the
> > > last step is adressed, then it stops, the number of
> > > steps that occur in one shot random mode cannot be
> > > predicted, same for CV adressed mode, i.e. CV
> > > adressing as normal until last step is adressed,
> > > then it stops)
> 
> i think the option for both would be great.
> 
>  again a toggle switch to set the parameters for the one shot 
mode. 
> down position for random steps until the last step is adressed. 
> middle position the number of steps that occur in one shot 
random 
> mode cannot be predicted. up position for the number of steps 
> selected i.e.
> 2 x 8 after 8 steps regardless of which steps were randomly 
selected, 
> the one shot ends and waits for a trigger or reset trigger, same 
goes 
> for the 16 step mode.
> 
> it is better to have the options now, then saying i wished they 
had 
> done them. we are talking about a serious control module 
here.
> 
>  
> 
> > > Because many customers suggested this: we will
> > > probably develop another low pass filter based on
> > > SSM2044 (used e.g. in Polysix and other Korgs, PPG,
> > > Siel and so on). For all "complaints" about this
> > > additional filter: customers want to have this
> > > filter, it's not our idea. One customer even agreed
> > > to purchase 100 SSM2044 or more in advance for us if
> > > we promise that we will offer a SSM2044 filter.
> 
> I like the idea of an ssm based filter, but it would nice if you 
> could add new features to it so does new types of filtering and 
not 
> just imitate those filters. just asking.
> 
> here goes a couple of stupid questions, would it be possible to 
have 
> 4 separate slopes? or vc variable slopes? could you also have 
a high 
> pass version?
> 
> RM
> 
> 
> > > 
> > > We will built a prototype of the recommended CV
> > > input expander (5 input sockets with attenuators
> > > that can be used to expand the number in CV inputs
> > > e.g. for filter frequency, via jumpers the 5 inputs
> > > can be combined in different ways, e.g. 3 + 2 or 1 +
> > > 4 or all 5 together). The inquiries/advance orders
> > > for this CV input expander will decide if this
> > > module will go into production. Suggested module
> > > number: A-137 (as it is nearly the same as the A-138
> > > but without the active amplifiers of the A-138, so
> > > the price will be nearly the same as for the A-138).
> > > 
> > > Kind regards
> > > Dieter Doepfer
> > > Doepfer Musikelektronik GmbH
> > > http://www.doepfer.de
> > > email: hardware@d...
> > > 
> > > Because of Christmas holidays and stock keeping our
> > > company is closed from December 20, 2002 until
> > > January 06, 2003.
> > 
> > 
> >  
> > 
> > 
> > =====
> > synthfreak(parallel worlds)
> > athens-greece
> > [Doepfer_a100] group owner-moderator
> > 
> > 
__________________________________________________

> > Do you Yahoo!?
> > Yahoo! Mail Plus - Powerful. Affordable. Sign up now.
> > http://mailplus.yahoo.com

--- In Doepfer_a100@yahoogroups.com, "ps_minor <pscottm@h...>" 
<pscottm@h...> wrote:
> yes, what RM said.  now that clock options are mentioned, why 
> not both?   i imagine the 154 will find itself running along side 
> pairs of 155s for many users, me for one.  so maximum flexibility 
> w two 155s will hopefully be well researched.  
> 
> an on/off toggle switch w momentary sync position for each 155 
> would be very useful.  be nice to hit the brakes on one 155, or 
> allow one to step out of order while the other runs in order, with 
> the ability to resync.   

I was thinking some more about the resync feature, here's an new idea.

if the A154 is is 2 x 8 mode, the toggle would behave like this,

Up position; stops the clock from sending a clock pulse to the A155

middle position; sends the clock pulse to the A155 without positional 
sync to the A155

Momentary bottom position; you hold the toggle down, the A154 waits 
until the last step, i.e. the 8th step comes around from the other 
A155 or from its own counter and unlatches the momentary switch and 
syncs to the 1st step. so if you want to throw the sync  off you just 
throw the toggle up to the off for however long you need to offset 
the from the other A155 and back to the middle position to send the 
clock pulse back in.

now when you have both of the A155's in 2 x 8 mode the clock pulse 
would need a counter for this function alone.

once you go to 1 x16 mode the togggle switch become inactive or you 
could use them for another function like a first step toggle and a 
last step toggle, just as you would on the MAQ16/3. now this would be 
mucho cool. this will definitely bring the A154 & A155 combo to new 
analogue sequencing heights. these are very strong sync features that 
would add greater interactivity to the A155's. 

What do you think? Should we do a poll about the sync options?

RM

> 
> also, i think RM's suggestion for cv slope control could be a 
> deciding factor for me in buying 'yet another filter'.   would beat 
> having to buy 2 extra modules for morphing slope (a la 108).
> 
> -psm
> 
> 
> 
> 
> --- In Doepfer_a100@yahoogroups.com, "ringmod45 
> <ringmod45@y...>" <ringmod45@y...> wrote:
> > --- In Doepfer_a100@yahoogroups.com, bakis Sirros 
> > <synth_freak_2000@y...> wrote:
> > > 
> > > > ----- Original Message ----- 
> > > > From: Dieter Doepfer 
> > > > To: bakis sirros 
> > > > Sent: Wednesday, December 18, 2002 1:30 PM
> > > > Subject: AW: about the a130,a131,a132
> > 
> > > > Latest news: A-154 prototype is working now. But we
> > > > are not sure for some features:
> > > >   a.. Should the internal clock generator stop in
> > > > stop mode or continue clock generation in stop mode
> > > > ? 
> > 
> > Personally, i think it should be able to continue and you should 
> have 
> > tthe option to do both, i.e. voltage control of the master clock, 
> > which is already there and the ability to select which A155 you 
> wish 
> > to stop start while having sync and the ability to resync. a 
> couple 
> > reasons.
> > 
> > 1) since it is the master clock for 1 or 2 A155, if you stop the 
> > clock then both A155 stop. now if doesn't stop the clock , one or 
> the 
> > A155 can continue.
> > 
> > it would be best if there was a way to individually stop one or 
> and  
> > or both of the A155's from the A154. for this to happen, you 
> would 
> > need 2 toggle switches for both of the A155's and maybe a 
> couple of 
> > extra inputs to for VC. the switch should be designated, bottom 
> > position is momentary to sync the a155's to the current 
> position of 
> > the other A155 if it is 2x8 mode, middle position is the on 
> positon  
> > and the top position is an off position.
> > 
> > 2) it could clock other sequencers , EG's, pulse dividers etc. 
> > 
> > 
> > The advantage is continuos clock is that one could
> > > > adjust the clock speed in advance (LED display of
> > > > clock). The advantage of stopping clock is that the
> > > > clock would exactly in sync when start is triggered
> > > >   b.. Should the one shot modes even be possible for
> > > > random and CV adressed mode and if applicable how it
> > > > should work (e.g. for random: random steps until the
> > > > last step is adressed, then it stops, the number of
> > > > steps that occur in one shot random mode cannot be
> > > > predicted, same for CV adressed mode, i.e. CV
> > > > adressing as normal until last step is adressed,
> > > > then it stops)
> > 
> > i think the option for both would be great.
> > 
> >  again a toggle switch to set the parameters for the one shot 
> mode. 
> > down position for random steps until the last step is adressed. 
> > middle position the number of steps that occur in one shot 
> random 
> > mode cannot be predicted. up position for the number of steps 
> > selected i.e.
> > 2 x 8 after 8 steps regardless of which steps were randomly 
> selected, 
> > the one shot ends and waits for a trigger or reset trigger, same 
> goes 
> > for the 16 step mode.
> > 
> > it is better to have the options now, then saying i wished they 
> had 
> > done them. we are talking about a serious control module 
> here.
> > 
> >  
> > 
> > > > Because many customers suggested this: we will
> > > > probably develop another low pass filter based on
> > > > SSM2044 (used e.g. in Polysix and other Korgs, PPG,
> > > > Siel and so on). For all "complaints" about this
> > > > additional filter: customers want to have this
> > > > filter, it's not our idea. One customer even agreed
> > > > to purchase 100 SSM2044 or more in advance for us if
> > > > we promise that we will offer a SSM2044 filter.
> > 
> > I like the idea of an ssm based filter, but it would nice if you 
> > could add new features to it so does new types of filtering and 
> not 
> > just imitate those filters. just asking.
> > 
> > here goes a couple of stupid questions, would it be possible to 
> have 
> > 4 separate slopes? or vc variable slopes? could you also have 
> a high 
> > pass version?
> > 
> > RM
> > 
> > 
> > > > 
> > > > We will built a prototype of the recommended CV
> > > > input expander (5 input sockets with attenuators
> > > > that can be used to expand the number in CV inputs
> > > > e.g. for filter frequency, via jumpers the 5 inputs
> > > > can be combined in different ways, e.g. 3 + 2 or 1 +
> > > > 4 or all 5 together). The inquiries/advance orders
> > > > for this CV input expander will decide if this
> > > > module will go into production. Suggested module
> > > > number: A-137 (as it is nearly the same as the A-138
> > > > but without the active amplifiers of the A-138, so
> > > > the price will be nearly the same as for the A-138).
> > > > 
> > > > Kind regards
> > > > Dieter Doepfer
> > > > Doepfer Musikelektronik GmbH
> > > > http://www.doepfer.de
> > > > email: hardware@d...
> > > > 
> > > > Because of Christmas holidays and stock keeping our
> > > > company is closed from December 20, 2002 until
> > > > January 06, 2003.
> > > 
> > > 
> > >  
> > > 
> > > 
> > > =====
> > > synthfreak(parallel worlds)
> > > athens-greece
> > > [Doepfer_a100] group owner-moderator
> > > 
> > > 
> __________________________________________________
> > > Do you Yahoo!?
> > > Yahoo! Mail Plus - Powerful. Affordable. Sign up now.
> > > http://mailplus.yahoo.com

yes.  i'll vote.  i think functions like these will really set the 
154/155 apart..  anyone out there have an opinion??   
psm




 now this would be 
> mucho cool. this will definitely bring the A154 & A155 combo to 
new 
> analogue sequencing heights. these are very strong sync 
features that 
> would add greater interactivity to the A155's. 
> 
> What do you think? Should we do a poll about the sync 
options?
> 
> RM