E-8 Buchla to Euro Converter
X is 1.2V/octave input
Y is gate/trigger input
Z is tune ±0.5 octaves
A is 1V/octave output
B is trigger output
Parameter Min Max Default Description
0 -8 8 0 Octave shift.
No video yet - we don't own a Buchla! Volunteers please get in touch.
This algorithm is for interfacing Buchla synths with Eurorack (or more generally, any analogue
synths using the 1V/octave standard).
Input X/Output A convert a pitch CV from the 1.2V/octave standard to the 1V/octave standard.
Input Y is intended to receive a Buchla-format combined trigger & gate signal (typically a 10V
trigger pulse followed by a sustained 5V gate). From this, output B generates just the trigger pulse
(at 5V). If you need the gate signal, you can directly use the Buchla output.
The Z knob/CV provides a tuning control, with a range of approximately ±0.5 octaves.
F-1 Clockable AD Envelope (with mute)
Video
X is clock input
Y is mute input
Z sets the envelope shape
A is envelope output
B is envelope output
Tap tempo enabled
Parameter Min Max Default Description
0 -15 8 0 Delay time multiplier.
1 -40 41 32 Output A Attenuverter.
2 -40 40 32 Output B Attenuverter.
3 0 32 26 Attack shape.
4 0 32 10 Decay shape.
This algorithm is a two-stage (attack/decay) envelope generator, whose overall time is set from an
input clock pulse. The envelope is continuously output (starting on each new clock pulse) unless
muted.
Input X is the clock input. Any clock pulse in excess of 1V can be used. The time between rising
trigger edges is used to set the envelope time.
Parameter 0 applies a multiplier to the envelope time, according to the table above.
Input Y is a mute input. While this input is over 1V, the output is forced to 0V.
Z sets the envelope shape, from short attack & long decay, to long attack and short decay.
Parameters 3 & 4 set the attack and decay shapes of the envelope respectively, from an exaggerated
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