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Input rendering
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Input rendering


  • Subject: Input rendering
  • From: Bill Farmer <email@hidden>
  • Date: Mon, 25 Oct 2010 18:35:10 +0100

Hi

I have ported a musical instrument tuner application from windows. I have two queries concerning audio units:

I have set up microphone input using the AUHal audio unit in accordance with Technical Note TN2091, which works fine. However I would like to increase the kAudioUnitProperty_MaximumFramesPerSlice from the default value. I have done this, using AudioUnitSetProperty(), but the AURenderCallback parameter inNumberFrames is always the default value. Is this the expected behaviour, or am I missing something?

I would like to set up a chain of audio units, an AUHal unit, a format converter, and a low pass filter. I have tried setting up a chain both using the audio unit api, and the AUGraph api. In both cases, I can't get the rendering callback to work. Again is this expected, or am I missing something?

Thanks in advance
Bill Farmer
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