Re: [Audacity-nyquist] modified osc-tri

[David R. S. <dav...@sh...>]

Hi Paul,

Check the Design Waveform plug in a zip file on my site

http://www.shellworld.net/~davidsky/design.zip

It creates and generates a waveform using straight lines, and based on the 
general way to design your own waveform in Nyquist using straight lines 
and pwl.

If you want to create a waveform that changes shape over time without 
using filters or an eq function for attenuating/boosting harmonics, I 
dunno at this time - probably simple to work out.

David

-- 
David R. Sky
http://www.shellworld.net/~davidsky/


On Fri, 31 Jul 2009, paul beach wrote:

> Can the slope of a triangle wave be modified, so that is, part triangle
> part sawtooth. A string plucked in the middle is triangular,  but more
> sawtoothed toward the bridge.
>
> MP3 for triangle guitar sound
>
> http://www.climatehoax.ca/audio/bass_55.mp3
>
> Nyquist guitar patch where damping is proprtional to variable frequency
> and constant air resistance.
>
> ; guitar
> (setf f 55.0 )
> (lp
>
> (sim
> (osc-tri (* f 1) )
> (osc-tri ( * f 2))
> (scale .25  (osc-tri (* f 3)))
> ;(scale 1  (osc-tri (* f 4)))
>
> )
> (mult (pwl ( / 1 f ) 1 0.25  (/ 2 (sqrt f ) ) 1 ) (/ f 2) )
> )
>