NICK'S WORLD OF SYNTHESIZERS

VALVE FILTER

Analogue filter
loudspeaker Drum loop 1

loudspeaker Drum loop 2

loudspeaker PWM 1

loudspeaker PWM 2

loudspeaker PWM 3

loudspeaker Synth

This is 3 valve filters wired in parallel, 2 bandpass and one that is switchable from low-pass to high-pass. The Q is adjustable from subtle to oscillation.

The 3 filters can all be controlled using 1 master control knob. There are other adjustments to make the master control knob have a different effect on each filter. So when the master knob is turned the filters sweep in different directions and by different amounts.

The result is very rich complicated filtering. This is further enhanced by imperfections of the valve design. There is lots of soft distortion and cross-talk between the 3 filters. Because the cross-talk is in both directions, it results in chaotic behaviour. The chaos is nice and subtle when the Q is low, and quite extreme when all 3 filters are oscillating.



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Name: a
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Date posted: 13:56, 12 05 2011
Message: a

Name: peter keene
E-mail: peter.keene@free.fr
Date posted: 17:14, 18 12 2010
Message: lookf far out all that tag board and wires
pointer knobs and and stuff
keep it up bravo
peter

Name: Davide
E-mail:
Date posted: 09:01, 31 08 2010
Message: very very very amazing!