David Ranch <[email protected]> writes: > I looked at doing this with sox and it's "pitch" feature but that > command does everything in ‘cents’ and 'semitones' and I have NO clue > of what those are!
It's not the right tool for this job: you want a frequency shifter, not a pitch shifter. A pitch shifter multiplies all the frequencies present in the signal by a constant factor, whereas a frequency shifter adds a constant offset onto all the frequencies. Pitch shifters are generally more useful for audio work because they don't mess up the ratios between frequencies -- e.g. the harmonics of a complex sound, or the intervals between notes in a piece of music (hence semitones and cents -- a musical octave is a frequency factor of 2, there are 12 semitones in an octave so a semitone is a factor of ~1.059, and there are 100 cents in a semitone). The bodeShifter LADSPA plugin I used was originally intended for producing weird sounds in audio synthesisers. -- Adam Sampson <[email protected]> <http://offog.org/> ------------------------------------------------------------------------------ Master Java SE, Java EE, Eclipse, Spring, Hibernate, JavaScript, jQuery and much more. Keep your Java skills current with LearnJavaNow - 200+ hours of step-by-step video tutorials by Java experts. SALE $49.99 this month only -- learn more at: http://p.sf.net/sfu/learnmore_122612 _______________________________________________ Freetel-codec2 mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freetel-codec2
