Serge Waveshaper schemos on Music Machines

Jim Johnson jamos at
Thu Jul 16 23:07:07 CEST 1998

Coupla questions for anyone who has seen the Serge schematic Sean Costello
located at Music Machines, for anyone who cares to hazard some guesses.

1) Which waveshaper is it? It looks closest to #2 based on the number of
ins and outs, but it's not a perfect match.

2) Anyone know which input is which?

3) What's the polarity of the op-mp - which terminal is +?

4) Why use an LM3900 in this circuit, rather than a TL-074? 


Jim Johnson 
Metaphoric Software
Makers of Techno Toys
Software for Electronic Music
info at

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