On Sun, 6 Oct 2013 13:29:23 -0700 Ken Restivo <ken@xxxxxxxxxxx> wrote: > On Sun, Oct 06, 2013 at 10:55:15AM +0000, Fons Adriaensen wrote: > > On Sun, Oct 06, 2013 at 01:59:15AM -0700, Ken Restivo wrote: > > > > > http://www.horst-theremin.com/images/_mid%20600%20Hz.jpg > > > > You don't need to reproduce the waveform, but the spectrum, > > which is roughly: > > > > Freq Amp > > --------------- > > 1 1.000 > > 2 0.191 > > 3 0.065 > > 4 0.041 > > 5 0.019 > > 6 0.012 > > Cool, thanks. > > How would one do that with LADSPA plugins? 6 sine wave oscillators into a mixer, one for each harmonic? > > I vaguely remember seeing an oscillator (maybe in AMS?) that had mixer settings for various harmonics, but I'm pretty sure it only went up to the first 3. > > Also, were you really able to come up with that harmonic recipe just by looking at that waveform? If so, I find that remarkably impressive. I had a go at this with AdSynth in yoshimi but the harmonic amplitude only has 64 steps (which I think are linear). I worked to the nearest approximation, which left 6th harmonic at zero. It sounds sort-of right but not totally convincing. > > > > Apart from that the sound will be frequency and amplitude > > modulated by minute movements of the player's hands. > > > > True, that has a lot to do with the sound. I was thinking a ribbon controller or a simple X-Y trackpad (or an OSC thing on an Android tablet) would take care of that. To get somewhere near this I put a light delayed vibrato on it, enabled portamento and used the pitch wheel on my keyboard. A touch of reverb and I was nearly doing the effects of 'The Forbidden Planet' :) -- Will J Godfrey http://www.musically.me.uk Say you have a poem and I have a tune. Exchange them and we can both have a poem, a tune, and a song. _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
