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Audio synthesis via vacuum tubes/Metasonix TS-21 hellfire modulator: Difference between revisions
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Audio synthesis via vacuum tubes/Metasonix TS-21 hellfire modulator (view source)
Revision as of 10:51, 5 April 2023
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The beam modulator in the TS-21 is wired to a built in LFO. This LFO can be disabled if the modulation effect is not wanted, by turning down both the L1 and L2 controls.
It causes the beam to switch back and forth between two anodes, which then go to the output. That's right this is a stereo modulator. You can insert either a mono 1/4" plug into the AUDIO OUTPUT jack, and get a mono signal. Or you can insert a stereo plug, and get a stereo effect. The beam tube switches the signal back and forth between the two outputs. Plus, the beam tube has something solid-state lacks a screen grid. By adjusting its voltage, we get both gain control, and we get variable distortion of a very unusual nature! You have to hear its effect to understand. The beam tube is very non-linear in most settings, so it can be used as a distortion effect. At some positions, the beam screen control causes waveform "folding" roughly similar to that seen in the [[Ken Stone/1973 classic Serge/Serge tripple wave-shaper|Serge waveshaper]] modules but with tube-style nonlinearities.
== Controls ==
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