
"From Ian Fritz, The DoubleDeka Ultrasonic VCO is here!!!
From the Documentation...
This unique VCO consists of an ultrasonic oscillator core followed by a parallel pair of waveform generators. Each waveform generator consists of a switched multi-octave divider followed by circuitry to generate a 10-step waveform using a set of 10 slider potentiometers. Also included are a novel synchronization circuit with two different operating modes and a built-in "digital ring modulator" (DRM) for producing a wide variety of synchronized and anharmonic sounds. The oscillator core is highly stable (better than 20 ppm/K in the prototype) and features wide-range, accurate tracking (better than 0.05% over fifteen octaves). The variable waveform generator provides fine control over an enormous range of available timbres."
Drawing a waveshape for an audio oscillator, especially with only ten segments, it pretty useless and doesn't really relate to the sound in any intuitive way. Should have harmonic/phase control.
ReplyDeleteThis could be useful for an LFO.
You don't "draw the waveshape" on the DoubleDeka.
ReplyDeletehttp://electro-music.com/forum/download.php?id=14068
I daresay Ian Fritz understood that a ten segment waveform would be a trite function long before a majority of the readership of this blog was even conceived.
LOL.
ReplyDeleteWell, if you draw a Saw, it sounds like a Saw. Intuitive enough for me. You would prefer to dial in the exact amplitudes of 50 harmonics? And how would you make such a device, using analog electronics?
I've used this module for over 30 years, and I wouldn't have put it out if I -- and numerous other folks -- didn't think it was useful. It gives an incredible variety of sounds in a simple package. Way more than any other analog VCO I know of.
More accurate and stable than most, too. Tracking to +/- 0.05% over 15 octaves. Drift under 50 ppm/K.
Having only ten steps does give it a characteristic somewhat edgy sound. I happen to like it. Others may not. (That's why we have "filters".)
Listen to the demos and decide. I don't make any money off these -- It's about sharing something I have found useful with the community.
Boy was I in left field on that one - you do draw the waveform....
ReplyDeleteOh well, sounds pretty dang good to my ears. Do check out the samples.
Sorry about that....I'll crawl back under my rock now.