MATRIXSYNTH: Crumar Performer with octave slider plus sustain options!

Saturday, August 01, 2015

Crumar Performer with octave slider plus sustain options!

Published on Aug 1, 2015 sounddoctorin

"Bob Weigel of shows a tech brief and demo of his latest modification. The last Crumar Performer version I have used the SSM2040 vcf and a SSM2056 eg in place of the moog vcf and discrete eg. with it's quirky interactive behavior used in the original units. The last version also adds an octave switch.

As it turns out barely over an octave can be achieved at the summing node for pitch without causing oscillations to cease for whatever reason I discovered, as I installed a slider instead of a switch in this unit giving a lovely contiguous transition of pitch for 1 octave. Provided you don't retune it with the tuning pot on back :-). There is a requirement to readjust the trim pot I installed if you do that. But as long as you keep it on A440 it's a nice octave. SEE MY PREVIOUS video on the performer mod to see details of how to give yourself four modes of operation with regard to sustain and crescendos."

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