Just thinking out loud, but what would a PIC have to do to be a =
synthesizer?

One would need to start with the source, a wave form.  This could either =
be generated mathematically or based on internal tables. =20

Next would be to manipulate the characteristics of the sound.  There is =
the pitch, controlled by voltage, a good use for the A/D maybe.  =
Duration would be controlled by software.  Timbre would be the wave =
form.  Volume, I don't know how that would be done. =20

The shaping of the sound's ADSR (attack, decay, sustain, release) could =
be done in software, I think (depending on how volume works). =20

=20

> At 10:43 AM 6/19/2004 +1200, Jinx wrote:
>=20
> >> Texas Instruments used to make the SN76477 and the SN76496.
> >> These are listed as "sound generators" and were meant to be
> >> used in video games to produce a variety of sound effects
> >
> >Here are a couple of others
>=20
> The GI-AY-8910 went into a LOT of credit card terminals.
>=20
> One particular firmware set had a bug that would skip into a
> test routine we wrote for the sound chip, and generate a falling
> screech, then explosion sound.   An elegant way to crash, sort
> of..
>=20

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=20

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