Neurophone/Sinitsa addendum

a) Flanagan’s original design used extremely fast (500MHz?) transistors, mine used fairly slow (1MHz) op-amps. I think this may be one reason mine wasn’t very effective: the vastly higher slew rate of Flanagan’s transistors combined with his ‘clipping’ system to create a square-wave would give his square-wave a lightning-fast rise-time. In light of my experiments with the mu-metal / relaxation oscillator, I’m starting to suspect rise-time / slew rate is a critical component of how the body interprets signals.

b) One possible way, if an extremely unwieldy one, of creating the ‘NBFM voice changer’ I speculated about might be coupling the output of the Neurophone into the Sinitsa (also posted here. At the very least, eight or ten stages of various forms of not-very-hi-fi analog gain and transformation ought to distort things a fair bit…


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