There is the possibility with csound to put k or a VARIABLES in function
generators? I'm tryng to do some table morphing with ftmorf or tabmorph, but
I see that actually with these opcodes it's a linear CROSSFADING between
tables... I think it would be nice to morph PARAMETERS of function, rather
than function themselves...an example: to change the lengt of segment in a
GEN7 function like -1 4096 1 4096 -1 putting a variable -1, klengt, 1,
klengt1, -1 will generate a changing SHAPE of the triangle waveform and
non-linear distortion like pulsewidth etc, obtaining with klengt=0
klengt1=8192 a saw wave...the same with exponential curves or even better
with polynominals (changing coefficients)...
I suppose this is possible via waveshaping with table family opcodes, but to
obtain an effect like the example will be little tricky I think...specially
changing the shape at control or audio rate...
Some suggestions?
Thank you 
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I am not sure if it is possible to do this with the current set of opcodes.
ftgen only works with i-rate parameters.  You can modify tables at k-rate
using the Vectorial family of opcodes, but I am not aware of a way to use a
GEN function at k-rate.

This is probably not the right approach for creating dynamic spectra signals
anyways.  Changing a table at k-rate may introduce discontinuities in the
signal.  Effects like pulsewidth can be acheived with other specialized
opcodes.  Try looking at vco anc vco2 for example.  Other good dynamic
spectrum techniques include waveshaping (as you anticipated), FM, and
discrete summation formulae (see the buzz and gbuzz opcodes).

Anthony Kozar
anthonykozar AT sbcglobal DOT net
http://anthonykozar.net/

ad80a wrote on 7/31/07 9:16 AM:

> 
> There is the possibility with csound to put k or a VARIABLES in function
> generators? I'm tryng to do some table morphing with ftmorf or tabmorph, but
> I see that actually with these opcodes it's a linear CROSSFADING between
> tables... I think it would be nice to morph PARAMETERS of function, rather
> than function themselves...an example: to change the lengt of segment in a
> GEN7 function like -1 4096 1 4096 -1 putting a variable -1, klengt, 1,
> klengt1, -1 will generate a changing SHAPE of the triangle waveform and
> non-linear distortion like pulsewidth etc, obtaining with klengt=0
> klengt1=8192 a saw wave...the same with exponential curves or even better
> with polynominals (changing coefficients)...
> I suppose this is possible via waveshaping with table family opcodes, but to
> obtain an effect like the example will be little tricky I think...specially
> changing the shape at control or audio rate...
> Some suggestions?
> Thank you