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From: sbishop@watmath.UUCP
Newsgroups: sci.electronics
Subject: Re: Vibrators, and a part-hunt.
Message-ID: <13969@watmath.waterloo.edu>
Date: Sun, 19-Jul-87 01:32:45 EDT
Article-I.D.: watmath.13969
Posted: Sun Jul 19 01:32:45 1987
Date-Received: Sun, 19-Jul-87 04:35:16 EDT
References: <446@phoenix.PRINCETON.EDU> <448@phoenix.PRINCETON.EDU>
Reply-To: bmaraldo@watdcsu (Commander Brett L Maraldo)
Organization: Unit 36 Research
Lines: 17

In article <448@phoenix> kpmancus@phoenix.UUCP (Keith P. Mancus) writes:
>  Whoops, forgot the part-hunt.  Does anybody know of a good synthesizer-type
>chip with 2 or 3 voices and a mixer?  Primary considerations are

   There is a chip that was (is?) made my TI, part number SN76477N.  This
device has a low frequency osc, vco, noise generator, and full envelope 
generator, and a three channel mixer as well as a variety of external inputs
and controls on a single 28-pin DIP.  The timing and frequency characteristics
are controled by placing appropriate caps and resistors on the pins.  The 
SN76488N has an internal amp which will drive an 8ohm speaker, the 77N has 
a low level output.  Power is 4.5 to 12 volts (9 works best).  If you use
a bunch of these chips, you'll get the required number of voices.    


					Brett L Maraldo