Dear all, When trying to apply a pitch shifting effect on a pure sine wave using kAudioUnitSubType_NewTimePitch I always end up with a discontinuity at around 15870 samples (360ms @ 44.1kHz). This appears independent of the amount of pitch shifting and of the sampling frequency. It even happens if I start off with 100ms of silence and then 30ms of ramping up the sine wave from 0 to 50%.
When using kAudioUnitSubType_TimePitch instead the situation is worse: I get a whole bunch of localised artefacts at various (not periodic) locations up until about 2-3 seconds in. Does anyone have an idea of what might be going wrong? Note that if I keep the exact same code and just replace kAudioUnitSubType_NewTimePitch by kAudioUnitSubType_Varispeed then I don't get any artefacts which seems to rule out a problem with any buffering on my end. Also, the discontinuity is quite sharp, but goes over more than one single sample as would be the case if it's a buffering problem. The artefacts created by kAudioUnitSubType_TimePitch are a mixture of sharp (10-15 samples) discontinuities and amplitude fluctuations. Thanks a lot in advance! Martin
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