Subject: [linux-audio-user] freqtweak trick of the day
From: Jesse Chappell (jesse_AT_essej.net)
Date: Thu Oct 17 2002 - 07:38:15 EEST
Here is neat hack with the pitch scaling capability of freqtweak:
Pseudo Formant Corrected Pitch Scaling
To avoid the chipmunk effect when pitch scaling voices, try this in freqtweak:
Hold down Control and drag from about 1 or 2kHz off the left edge at the desired
pitch adjust. This effectively shifts the fundamental of the voice but leaves
the higher frequency formant information alone. It definitely has artifacts,
but really isn't too bad on female voices. Play with the cutoff point (reset
the filter with Ctrl-Alt-Right click and try again). Using a log freq scale
(middle-click) might help find the best cutoff.
For some general info on vocal formants see these pages:
http://dspdimension.com/html/timepitch.html
http://dspdimension.com/html/formantcorrection.html
jlc
This archive was generated by hypermail 2b28 : Thu Oct 17 2002 - 07:42:27 EEST