[sdiy] Thoughts on a Polyphonic Synth

[Dave Kendall]

For a low-cost polysynth, you might be able to get away with 2 EGs per
voice. For FM patches, one is assigned to control the modulator VCO, and the
other controls VCF and/or final VCA.
In a non-FM patch, you've got 2 EGs to share between pitch mod (or
whatever), VCF and VCA. That's already more flexible than many polysynths of
the 80s.

A  VC waveshaper per VCO on each voice card, could be a valuable addition to
make patches more interesting.....

cheers,

Dave



on 25/3/06 0:03, jure zitnik at kokoon at gmail.com wrote:

> true that but not for a potentially low-cost diy polysinth. ideally it
> would be simply expandable with cloned voice cards and all would share
> the same control bus.
> 
> imagine that. first you build the PSU, the digital board (uP and
> DAC/ADC), the motherboard (global modulation sources, final mixer,
> effects, ...) and one voiceboard. and you have a nice monosynth. from
> then on you're just adding the (cheap) voice boards >:)
> 
> jure
> 
> On 3/25/06, JH. <jhaible at debitel.net> wrote:
>> 
>>> Sure! A individual control for each parameter of each voice would be a
>> major
>>> overkill.
>> 
>> ... or it's where the _real_ fun starts. Playing with slightly different
>> voices and a
>> simple key assigner, or with considerably different voices and a key
>> assigner
>> that allows control over which voice will be played by which note you play.
>> I just say Emu / Oberheim.
>> 
>> JH.
>> 
>> 
>> 
>> 2006/3/24, Ingo Debus <debus at cityweb.de>:
>>> 
>>> 
>>> Am 24.03.2006 um 17:43 schrieb Benjamín Velasco:
>>> 
>>>> So this is a matter of just repeating modules for every voice?Are
>>>> there other considerations?
>>> 
>>> Usually you want a common control for each parameter of all the
>>> voices. For instance one knob for ADSR Attack instead of eight (one
>>> for each voice). No problem if every parameter is voltage controlled.
>>> 
>>> Ingo
>>> 
>> 
>> 
>