Hello Lindy, A very good source of Musical Application Data can be found in Hal Chamberlin's book "Musical Applications of Microprocessors" published by HADEN books. ISBN 0-8104-5768-7. My copy was printing #9 Second Edition in 1993, you might try Amazon to see if a copy can still be found. A good part of the book covers just about any synthesis method there is, with lots of theory behind it. No doubt many of todays Musical instruments and Musical instrument makers refered to this text. Happy reading and building. Vern ----- Original Message ----- From: Lindy Mayfield To: Sent: Friday, June 18, 2004 4:22 PM Subject: Re: [PIC]: Making sounds with Pics > 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. > > 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. > > The shaping of the sound's ADSR (attack, decay, sustain, release) could be done in software, I think (depending on how volume works). > > > > > At 10:43 AM 6/19/2004 +1200, Jinx wrote: > > > > >> 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 > > > > The GI-AY-8910 went into a LOT of credit card terminals. > > > > 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.. > > > > --- > Outgoing mail is certified Virus Free. > Checked by AVG anti-virus system (http://www.grisoft.com). > Version: 6.0.699 / Virus Database: 456 - Release Date: 6/4/2004 > > > -- > http://www.piclist.com#nomail Going offline? Don't AutoReply us! > email listserv@mitvma.mit.edu with SET PICList DIGEST in the body > > -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body