Continuing the discussion about the Taurus from the "Deeper Bass" thread...
When the Minitaur came out, Moog talked about its unusual oscillator sync feature whereby the two oscillators are reset right when a note is started. Then, after the start of the note, the oscillators are allowed to drift in the same way that any analog VCO's will drift.
The fact that they are sync'd right at the beginning would mean that phase of the two oscillators is the same at the start of the note, which means that they constructively interfere, which means that you get a super solid start to every note.
I've always liked that idea. I've been figuring out how to try this kind of note-on oscillator reset on my Polysix (especially with the six-note unison). Again, since I'm not a master of how analog oscillators function, I'm having difficulty seeing how to do it. I'm assuming that I'm looking for a cap that I would need to discharge (ie, quickly short) in order to reset the oscillator. The only cap that looks like a reasonable target would be C54 -- the 6200 pF cap in the per-voice section of KLM-366.
If I put a transistor (or other electronic switch) across this cap and sent it a pulse to quickly short the cap (thereby draining it), would it reset the oscillator?
Chip
--- In PolySix@yahoogroups.com, "feline1973" <feline1@...> wrote:
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> Well, you say that - but again, in all seriousness, what makes the Taurus sound so "deep" is not that it's billowing out a sine wave at 30Hz: it's more to do with the way the two VCOs roll around each other and their upper harmonics growl and mildly distort between (pulling a figure out of my ass here ;) something like 80 to 250Hz... psychoacoustically it makes for a hugely deep and solid sounding bass, cos your brain generates elephantine phantom fundamentals. Maybe :)
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> David
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