detect-speed did not work

[tshmak]

Hi,

I tried a simple sox tempo transform, and --detect-speed was not able to recover the message. I wonder if it is because of my audio or if there's a bug in the program. Would you be able to provide an example where detect-speed works as expected?

Many thanks for your help!

Tim

[swesterfeld]

I think this is a misunderstanding of what --detect-speed does. It doesn't detect/correct time stretching (which I believe is what sox tempo does) but replay speed changes (change both: tempo and pitch sox speed). An example can be found in the README section on speed detection, the sox command is sox out.wav out1.wav speed 1.05.

See

• https://github.com/swesterfeld/audiowmark#speed