Getting strange noise if using PitchShifter

[krigga]

When using PitchShifter on Android Im getting strange noise.

I get audio from mic with AudioDispatcherFactory.fromDefaultMicrophone(22050, 1024, 0);

and construct PitchShifter with new PitchShifter(1.5, 22050, 1024, 512);

Changing overlap (last parameter) of PitchShifter either silences the whole recording or does nothing.

Any thoughts?