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<DIV>I've been into synths, drum machines, etc. for the past couple years so I
know what I'm doing in that regard - the actual synthesis part - I've just
started picking up a couple analogs (PAIA Fatman, FR-77) to complement the VA
I've had for a couple years (Virus KB). I'm getting more and more
interested in the electronics side of things. I've been reading some basic
books on electronics, playing around a little bit w/ circuit bending a Casio
SK-1, etc. Started the PAIA a long time ago but burnt the circuit board
and just haven't gotten around to ordering a new PCB.<BR> <BR>I was
wondering how you go about finding mods in your synths - what type of
methodology you follow.<BR> <BR>I'm aware things like resistance
substitution boxes exist and I'd imagine that'd go a long way to determine the
proper resistor or pot to drop in to change the sound. <BR> <BR>One
question is how do you use something like a res. sub. box w/o pulling the
existing resistor - or do you pull each resistor you're trying out?
<BR> <BR>How can you be sure changing something like a resistor won't
result in longer term damage - like changing a resistor and something down the
line overheats after being on for a couple hours? </DIV>
<DIV> </DIV>
<DIV>For example, how do you know that shorting out a resistor wouldn't cause
any damage?<BR> <BR>How do you even know where to start? </DIV>
<DIV> </DIV>
<DIV>Is there some kind of method you use to determine which resistors might
affect the sound and how it might affect the sound or do you just kind of go
around systematically left to right, top to bottom and try changing resistor
values?</DIV>
<DIV> </DIV>
<DIV>I'm not talking about random circuit bending here - I'm talking about
something like increasing the max LFO rate on an analog synth or changing the
range of an OSC from an OSC Semitone pot. </DIV>
<DIV> </DIV>
<DIV>At this point, I can't read schematics very well but I'd guess this would
help someone who could - but what about when schematics aren't
available?<BR> <BR>Outside of simply changing resistance values you've got
some mods that send the output of a resistor to ground - how would you figure
something like that out? The resistance substitution seems like it might
be a fairly straightforward procedure but something like this would seem to
require a pretty good knowledge of circuit design in general.</DIV>
<DIV> </DIV>
<DIV>Hope this makes at least a little sense.</DIV>
<DIV> </DIV>
<DIV>Thanks - John Potter</DIV>
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