>> Well then your c is a function of frequency, it's also probably a 
>> function of "wave value" and "wave steepness" too in real life. (higher 
>> and steeper waves might propogate faster than lower waves).  Good luck 
>> calculating the frequency at a point though :-)  I'm thinking you might 
>> be able to do something clever with fourier though...
>
> Well, Reaktor's "Steam Pipe" instrument simplates dispersion using a 
> simple all-pass filter in the feedback loop. OTOH, it's only trying to 
> simulate a 1D wave. At exactly 1 point in space. Hmm, maybe you could do 
> some sort of interesting convulation operation?

I think if you are simulating a musical instrument, it would be better to 
get the resonant parts working first before you start trying to simulate 
different propagation speeds at different frequencies.  I would imagine that 
is a much smaller secondary effect.

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