[PD] What kind of processing would you call this?

[Tom Schouten]

hi chad,

i think you can call this both waveshaping and phase (or frequency) 
modulation. maybe you can even say this is the point where both methods 
'touch'.

it's waveshaping because it's a nonlinear mapping function. and it's phase 
modulation with a carrier frequency equal to zero (and a phase offset).

i've used it before in some pieces and i've heard other people mentioning it 
too.

tom




> I made a simple little patch that takes an incoming signal, and a scalar.
> It scales the signal by the scalar and then feeds it to a cos~ with a
> couple of little manipulations to make the mapping be to the sine function
> instead of the cosine function.
>
> My question is, what is this?  It's like waveshaping, but it uses the sine
> function so you can scale the input signal however much you want, and you
> always get an output value that is between -1 and 1.  One of my profs said
> that it might be akin to FM, but we didn't talk much about it.  Is this a
> common processing technique?
>
> The patch is online at http://www.sphericle.com/pd/sinshap~.pd if anyone
> wants to look at it.
>
> Thanks!
> Chad
>
>
> _______________________________________________
> PD-list mailing list
> PD-list at iem.kug.ac.at
> http://iem.kug.ac.at/cgi-bin/mailman/listinfo/pd-list