[sdiy] Simple AR tips

[Peter Grenader]

Electronotes had a circuit on a curve-bender (linear to expo) which could
derive these curves via a waveshaping function without incorporating VC of
the phase duration, which is the method that's more commonly incorporated
for this type of bending.



 I'm more 
Peng wrote:

I just finished one (of the many) AR envelopes, for the most part it's the
Charles Broduer schematic. Consists of 2 diodes, 2 pots, a 741, couple
resistors, and LED. I tended to avoid these designs but I'm expecting a MIDI
to trigger board from Mr. Maddox and needed envelopes that would reflect the
trigger velocities.
 First problem was the envelope would slow up considerably when it gets
close to zero. Not good for percussion. I fixed that by using an offset trim
(striaght from TL071 data).
  I've just started experimenting with the AR so if anyone has any opinions
or suggestions or tips, please let them flow. Such as capacitor types (
found that polyester SEEMS quicker than the specified electrolytic ). I
would like to tweak the response curves but not sure how to approach it.
  Any techniques for employing velocity in patches would be very interesting
to hear about.
 
Thanks,
P.


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