[Speex-dev] Pitch Shift

Jean-Marc Valin Jean-Marc.Valin at USherbrooke.ca
Thu Jan 27 10:45:31 PST 2005

>    Since Speex codec is based on CELP technology,  so if we change the
> pitch intentionally  when encoding/decoding spx files, can we get the
> Pitch Shifting effect without speech formant changed?

With a 1-line hack in the decoder, you can indeed create a pitch
shifter. However, expect the results not to be as good as for a
"real" (originally designed for that) pitch shifter.


Jean-Marc Valin <Jean-Marc.Valin at USherbrooke.ca>
Université de Sherbrooke

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