Re: Amplifone yoke

I seem to recall someone recreating the sounds for Space Invaders in an
FPGA and outputting
those sounds through a one bit DAC that Clay is somewhat familiar with.
The *non universal* boards
would all be like that. All you are doing is creating the digital
equivalent of the analog circuit and
blasting that data out to your ears. The effects were very accurate.

It's been a while, but the universal sound board had something like 9
DACs and a microcontroller, right?
That's a perfect candidate for emulation. You could put all of that
into an FPGA, but I think a
person well versed in emulation could pull that off with a
microcontroller and a DAC.

Ed

Clay Cowgill wrote:
>> Just throwing this out there, but how hard would it be to
>> recreate the various original sound boards in a PAL/CPLD with
>> whatever external analog parts are needed ?
>>
>
> There really wasn't much digital stuff on the Space Fury/Eliminator/Zektor
> (analog) sound boards that'd call for a PAL/CPLD... Couple latches, but
> mostly analog-- loads of opamps, timers (555 style), noise generators,
> muxes, transistors, caps, other passives, etc. Lots-o-parts. ;-)
>
> Could probably use something like the Cypress PSOC line to integrate some of
> the analog stuff, but getting the same 'sound' from modern components can
> actually be pretty tricky. (Just look at the lengths some of the '80s synth
> enthusiasts have to go to when replacing parts to keep the same sound.
> Transistors, different types of capacitors, opamps can all effect in various
> ways.)
>
> Soooo... It could be done I'm sure, but it's way above my pain threshold.
> Neil and I had really good luck getting high quality recordings from my
> boardsets-- we just didn't get a *complete* set of samples due to various
> problems with the assortment of analog sound boards I had available at the
> time. (they be need'n some fix'n before trying again. ;-)
>
> -Clay
>
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Received on Fri Oct 2 03:58:35 2009