TD-PSOLA …the hard way

Time-Domain Pitch Synchronous Overlap and Add (TD-PSOLA) can modify the fundamental frequency and duration of speech signals, without affecting the segment identity – that is, without changing the formants. Normally, it’s an automatic algorithm, but here we do it the hard way – by hand!

If you want to follow-along, you will need Audacity and these materials (a zip file containing a set of Audacity projects for the various stages of the algorithm).