[CLAM] synthesizing SMS models in Pd

Xavier Amatriain xavier at amatriain.net
Fri Dec 14 03:58:04 PST 2007

Rich, I think you are writing to the wrong list :-) We can probably help 
you with the SMS stuff if you
formulate it in general terms but not so much with pd internals ;-)

Rich E wrote:
> Hi list,
> I've been working on getting a real-time spectral-model synthesizer 
> going, so far it handles 1TRC SDIF files quite well!  Now I am onto 
> synthesizing the noise residual, but want to ask a couple questions 
> first:
> - Is there any other processing that needs to be done to the 1STF 
> data, or is it ready to hand to [ifft~] as is?  I assume that I need 
> to apply a window first, but maybe this is already done.  Also, would 
> pd's [rifft~] suffice (It adds the second half of the fft by symmetry)?
> - With the partial data, I interpolate the frequencies for every 
> sample because I am handed a frame for roughly every 10ms.  However, a 
> 1STF frame should cover 512 samples, which is roughly the same time.  
> Should I just set pd's blocksize to the fft size and send it a new 
> 1STF frame every time I synthesize a new 1TRC frame, or will I need to 
> interpolate the 1STF data to get smooth transitions still?
> If you can help clarify these issues for me, it is much appreciated.  
> Sorry if it is listed somewhere in Serra's publications, or in the 
> code.  I looked, couldn't find what I needed to know.
> RIch
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