AUGraph mixer unit does not call input callback for 44.1 sample rate
AUGraph mixer unit does not call input callback for 44.1 sample rate
- Subject: AUGraph mixer unit does not call input callback for 44.1 sample rate
- From: Tim <email@hidden>
- Date: Tue, 26 Nov 2013 17:58:17 -0600 (CST)
I have an AUGraph with kAudioUnitSubType_MultiChannelMixer feeding input to kAudioUnitSubType_VoiceProcessingIO AudioUnit for output on iPhone. It works fine when I have sample rate set to 8000. But, when I set to 44100, the input callback (AUGraphSetNodeInputCallback) for the mixer unit never gets called. The output (recording) callback on the VoiceProcessing continues to get called as expected, so the graph is running. All error returns are 0. I have the same sample rate set on all of the inputs and outputs. The only thing that looked peculiar is the mixer output (and corresponding input to the output unit) are set to 2 channels, even though everything else is mono. But, I see the same with the 8khz version which works. Any ideas what could be happening or how to track it down?
thanks
Tim
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