[sdiy] Microchip PSG - AY8930

[mike ruberto]

I believe you can program them to make white-noise sounds too. With a
bunch of simple resonant bandpass filters you could make an
interesting perc-synth type deal. Maybe even provide a Midi input for
it so you could play from a Midi controller with pads.

Mike

On Fri, Apr 25, 2008 at 10:23 AM, Eric Brombaugh
<ebrombaugh at earthlink.net> wrote:
> Tom Arnold wrote:
>
> > On Tue, Apr 22, 2008 at 09:13:03PM -0700, Ben Lincoln wrote:
> >
> > >
> http://www.datasheet4u.com/html/A/Y/8/AY8930_MicrochipTechnology.pdf.html
> > > ...
> > >
> > > If anyone is interested, but not $5 each interested, I got mine in
> Jameco's small analogue/linear grab bag the first time and many more in a
> large version of the same grab bag a month or two after that.
> > >
> >
> > On a whim I stopped by Jameco and grabbed some of the grab bags.  Out of
> two
> > bags, I have at least 30 of these things now.  Probably more.
> >
> > Gotta think of something to do with'em now...
> >
>
>
>  That brings back memories - back in high school ca. 1980 or so, I hooked an
> AY3-8910 up to my old 6502-based OSI Superboard and wrote a BASIC program to
> simulate seashore sounds. It had noise modulated by a slow LFO for waves,
> periodic foghorns and random seagull cries. I'm sure my recollection of it
> is better than it really sounded, but it was pretty cool to play with.
>
>  What to do with 30+ of these things? They're designed to hook up to an
> 8-bit processor bus - how about a multi-voice MIDI-based synth, kinda like a
> SIDstation? You could probably drive a bunch of them with a cheap MCU (PIC,
> AVR, ARM, etc), but they're basically only PWM waves with fairly coarse
> amplitude modulation & built-in envelopes. Could be fun if you like that
> lo-tec '80s video game sound.
>
>  Eric
>
>
>
>
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