[linux-audio-user] freqtweak trick of the day

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