via JH.
"First of all, a big thank-you to all those who have pre-ordered PCBs for my "Living VCOs" project!
The huge request for this has taken me by surprise. I never had so many pre-orders coming within the first couple of days for *any* of my other PCBs, and if it goes on like this it may be the first project that could be sold out before I even get the boards from the factory. :) - Ok, but I don't really expect that. [see this post for ordering info]
Anyway: Even though the strength of these VCOs lies in the animated bass range of three of them playing together, there is another feature I've built into them, and that's the CS-80-style PWM. Like the Yamaha CS-80, the Living VCOs have a limited pulse width. Even with strong pulse width modulation, you never "lose" the VCO signal, because you never get down to 0% or up to 100% pulse width. What may sound like a limitation at first, actually opens the possiblitity of "overmodulation": You can modulate the pulse width with a triangle LFO of rather slow rate, and with a depth that would normally be bigger that 100% modulation index. As a result, the modulation is clipped, becomes trapezoid-shaped. Musically, this is like a periodic "push" of the modulated oscillator's pitch - something that sounds less detuned than
ordinary PWM and allows a sonically very rich modulation. I've made a short demo to demonstate this:
http://www.jhaible.de/living_vcos/living_vcos_single_vco_pwm.mp3
(One VCO thru wide open filter + VCA + reverb)
Project description and a 3-VCO-demo is here"
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© Matrixsynth - All posts are presented here for informative, historical and educative purposes as applicable within fair use.
MATRIXSYNTH is supported by affiliate links that use cookies to track clickthroughs and sales. See the privacy policy for details.
MATRIXSYNTH - EVERYTHING SYNTH
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