[linux-audio-user] stretching sound

Alexandre Prokoudine avp at altlinux.ru
Mon Dec 1 06:25:42 EST 2003

Julien Claassen wrote
> Hi all!
>   I've been trying to stretch a soundfile. It is a piano track with mostly two
> voices only. I did it with an fft plain phase vocoder. Now there are a lot of
> parameters and I got some undesireable delay. In general the stretched sound
> was good, but the delay is disturbing. So here's the question, how should I
> set the following parameters to get the best result?
>   fft-length (as high as possible?), windows per second, window length,
> windowtype (hamming, triangular, kasier with several coeffecients).
>   Any ideas or practical experience with that? - I'm NOT doing it in realtime,
> so CPU-time is no problem. I've got time! :-)

Audacity 1.2

Alexandre Prokoudine		| "When you set yourself on fire and aim 
ALT Linux Documentation Team	|  for the sky, you hope to leave behind 
E-mail: avp at altlinux.ru		|  some sparks of heat and light"
JabberID: avp at altlinux.org	|                             Neil Peart
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