Usefulness of 'Slow Random' noise versus 'Boing' filter
synth1 at airmail.net
Mon Mar 16 19:31:53 CET 1998
Actually, this is the sort of stuff I get on MOTM Noise board prototype. The original Electronotes circuits talks about
"10 volts pk-pk at around 10Hz", but no way!
I use a 150K feedback with a 22K input resistor, and get about 40Hz average out at around 0.75V pk-pk. Which
I guess the question I have: is it usefu??.
I was playing around with the 'Random Vibrato' filter. If I patch it up the the s&h clock, I can real nice 'boings' out
of it (the 'boing' time set by the Q pot). The original circuit was triggered by white noise, but unless the Q is very
high, not much happens. At high Q, the filter self-oscillates at a fixed 7Hz.
So, what if I scrap the "Slow Random" jack, and use it as an input to the boing filter. I can normalize it to the
internal S&H clock. Any sharp edged input <7Hz would boing it as well.
From: Roy Tate[SMTP:roytate at ionet.net]
Sent: Monday, March 16, 1998 10:58 PM
To: 'Paul Schreiber'
Subject: RE: ASM1 Noise Gen question
>Just curious what the 'Slow Random' output voltage is on a scope.
>Amplitude and frequency range.
I am getting about 30 Hz and about 0.5v (not optimal!) from
a 2N3904 in my ASM-1. The signal seems to favor positive
voltages, with occasional negative excursions.
Frequency measured with a Fluke meter, amplitude
measured with standard opto-neural linkage [eyeball :) ]
on a scope.
roytate at ionet.net
More information about the Synth-diy