Interesting reads!
Here¹s what I¹m wondering, reading posts like these and Crow¹s while most
of it goes way over my head, how far fetched is the idea of a cloned CS80?
As a midi module? (Even though it maybe as expensive or even more expensive
than a real one, it would be new and serviceable I guess?) In my (very
limited) brain, if you have thee voice cards, you have the sound source.
Hook it up to Midi, perhaps a memory to store a zillion presets etc..
Jeroen
On 9/25/07 5:51 PM, "David Rogoff" <david@...> wrote:
>
>
>
>
> Scott Rider wrote:
>> > I have no plan for designs beyond the standard M board at this time.
>> > I need to proof and verify that the basic voice card works "as
>> > advertised" so that actually using it to replace broken cards means the
>> > machine still sounds like a CS-50/60/80.
> Seems very reasonable!
>> >
>> > The EGs btw are (lowers voice to a mumble) ∗digital∗, using PICs and
>> > calculated rate tables similar to the EG-S chip of a DX voice engine.
> A couple of questions here. How fast are the envelope samples? What
> kind of digital/analog interpolation/smoothing are you using? Also,
> I've thought many times about replacing most of the KAS and KBC boards
> with one, cheap FPGA. The problem is that the CS80 runs all the digital
> logic off +8.5v/-6.5v (= 15volt supply) to interface with the analog
> stuff and modern digital chips will fry at any anything over 3.3v. How
> do you handle the PIC? Outboard DAC? A billion level shifters?
>
> Thanks & good work!
>
> David
>
>
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