## Buchla patch question

Discussing some incredible modules that don't quite fit into the other forum categories.

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seraphon
Common Wiggler
Posts: 71
Joined: Mon Jun 13, 2011 4:13 pm

### Buchla patch question

What is the most "economic" way to "open" an osc exponentially and at the end of the envelope, end in a "strike"-type lpg "bongo"? Does that really involve at the very least say the 259, 281, 292 and the 256? Thanks for any tips.

vgermuse
Super Deluxe Wiggler
Posts: 2990
Joined: Sat Apr 23, 2011 3:42 pm
Location: ashland, oregon

### Re: Buchla patch question

seraphon wrote:What is the most "economic" way to "open" an osc exponentially and at the end of the envelope, end in a "strike"-type lpg "bongo"? Does that really involve at the very least say the 259, 281, 292 and the 256? Thanks for any tips.
Hmm...I’ll give it a whirl but I’m not sure I fully understand the question...
The phrase “open an osc” has me stumped. We could “open” or “engage and increase” the timbre or symmetry or high order of a 259...or we could
“open” a lo pass gate or vca.

I chose to increase the timbre on a 261e and open the 281e with velocity
(gray jack) and ping the 281e at the end of the cycle with the 281e in
quadrature mode. In reality the bong sounds great but not so much
on this, my cellphone recording—video/audio of patch here:
https://www.dropbox.com/s/kf2i06u35hzcq ... o.MOV?dl=0

seraphon
Common Wiggler
Posts: 71
Joined: Mon Jun 13, 2011 4:13 pm
Thanks for the reply! Ah yes, I can see the wording was ambigious (or wrong!) sorry about that. I meant «open up the lpg with an exponential envelope», ending in a bang. Quadrature mode; Ah that Helps. Still need the route through the 256 I guess.

dougcl
Number 6
Posts: 4043
Joined: Sat Jul 26, 2008 3:04 am
Location: Portland OR
The most economical way I can think of has the audio going to two channels of the 292e. Send 281e envelope to one and 281e pulse to the other. Monitor 292e mix output.

vgermuse
Super Deluxe Wiggler
Posts: 2990
Joined: Sat Apr 23, 2011 3:42 pm
Location: ashland, oregon
dougcl wrote:The most economical way I can think of has the audio going to two channels of the 292e. Send 281e envelope to one and 281e pulse to the other. Monitor 292e mix output.
D’oh! Brilliant!

Drillionaire
Wiggling with Experience
Posts: 360
Joined: Mon Jan 26, 2015 7:35 pm
Another way to get expo/log envelopes out of a 281e is feeding back the 281e's envelope to the decay input. Using a 256e/257e you can attenuate/scale the feedback to switch between log/expo, and add breakpoints so that it will only scale parts of the envelope.

vgermuse
Super Deluxe Wiggler
Posts: 2990
Joined: Sat Apr 23, 2011 3:42 pm
Location: ashland, oregon
Drillionaire wrote:Another way to get expo/log envelopes out of a 281e is feeding back the 281e's envelope to the decay input. Using a 256e/257e you can attenuate/scale the feedback to switch between log/expo, and add breakpoints so that it will only scale parts of the envelope.