Subject: [linux-audio-dev] pitch-shift library
From: Florin Andrei (florin_AT_andrei.myip.org)
Date: Fri Jun 18 2004 - 05:15:55 EEST
Anyone knows a library (or an algorithm or something) for CPU efficient
pitch-shifting?
Essentially, i want to take arbitrary audio input and pitch shift it
just a little bit, indeed very little - the shift should be so small as
it would not even qualify as out-of-tune for most practical purposes
(provided that the original sound is perfectly in-tune). A shift not
bigger than the usual tuning error of ordinary unplugged instruments.
I also need to vary the shift, not too fast (the pitch shifting
modulator will change the shift up and down a couple times per second or
less), but still change it dynamically.
The algorythm should be efficient enough to allow real-time processing
of at least 16 sound channels simultaneously, and still leave some CPU
power untouched.
All this should be incorporated into a LADSPA plugin that i plan to
build (and it's only a part of the functionality).
-- Florin Andrei
This archive was generated by hypermail 2b28 : Fri Jun 18 2004 - 05:12:08 EEST