Unused input schematics

[jbv]

> The schematic with the partially used 4049 is
> http://www.firebottle.net/stompbox/insanity.GIF and the one with the half
> used TL072 is http://www.firebottle.net/stompbox/shaka3.jpg  I hope this
> helps.

As for the TL072, the first thing that comes to mind
is to replace it with a TL071 (although I'm not 100%
sure both op-amps have the same characteristics -
have to check the data sheets - and of course, if
there's already a PCB design for the circuit
with the TL072, it has to be modified to accomodate
the TL071 pin-out).

Another idea would be to keep the TL072, and to
use the 2nd onchip op-amp as a 2nd input, duplicate all
the rest of the schemo and get a stereo effect...

All trim pots can be duplicated as separate parts,
OR one can use double pots to adjust each parameter with only
1 pot for both channels...

jbv