[linux-audio-dev] [ann] pvoc-0.1.0, caps-0.1.11

[Jesse Chappell]

Tim Goetze wrote on Tue, 23-Mar-2004:

 > pleased to announce the new DSP package 'pvoc'. at its core, it
 > features the CARL phase vocoder.
 > 
 > there are three LADSPA units in this package (Exaggerate, Transpose,
 > Accumulate) plus a commandline utility for time compression and
 > expansion of n-channel audio data streams.
 > 
 > compilation of this package will probably be an even rougher ride than
 > with the initial release of caps (pvoc depends on FFTW3 and sndfile)
 > but i'll be happy to help should you run into problems.

The stretch program was not properly clamping the output from
-1.0 -> 1.0 yielding to terrible cracks upon writing as 16bit
wave files when the output is clipped.  The fact that non-clipping
(but very close to) input yielded clipping output is another issue,
but not crucial.

I've attached a patch that fixes the problem.

Other than that, this sounds pretty darn good compared to soundtouch
(a time domain algorithm) at more extreme stretch factors.

jlc


 
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