TI-H: MIDI with SID chip

To: ti-hardware@lists.ticalc.org
Subject: TI-H: MIDI with SID chip
From: "Richard Piotter" <richfiles1@hotmail.com>
Date: Sun, 08 Mar 1998 23:08:58 PST
Reply-To: ti-hardware@lists.ticalc.org


>Where do you get a SID chip or application information?

The SID chip was the chip that generated audio for the Commodore 64 and 
128. Comparable to Nintento or Gameboy sound, and very simple. I have a 
book with a whole section on it. I tried to find it, but It's at my moms 
house, so I'll have to pick it up. Jameco sells the 6581 SID, which is a 
12 volt version. I'll look to see if thereis a 5 volt only version. 
Otherwise, a DC/DC converter may be possible. I can guarante it'll draw 
some power, but for decent sound, I think a box may be nescesary. Also, 
something betwer must have come allong. The SID is just the model to go 
by. There may be newer ones too. We'll just have to see.

>>Yeah.. I used to do sound programming on the C-64, which I believe is 
the same
>>chip..  (might be a little earlier version.) anyway.. you just needed 
to tell
>>what waveform it was then put in the note values..  it did have pretty 
nice
>>sound..  I gotta admit it would rock on a TI :)
>>
>>> >waveform generator, but I doubt it. Personaly, I'd use the SID chip 
from
>>> >the commodore 128. It had 3 chanels, 4 waveforms (sine, square,
>>> >triangle, and noise), and it has 4 bit audio amplitude control 
(volume
>>> >from 0 to 15), and the wave form is 12 BITS!!!. That's high 
quality. You
>>> >don't need much to control it Atack, sustain, reverb, decay, 
waveform,
>>> >pitch, and volume level. The SID chip can emulate a Piano and play 
a not
>>> >with a few commands!!! I've set it up to play music before with 
piano
>>> >carring the melody, harpsichord on harmony, and noise to simulate 
drums!
>
>
>



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