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POiOS - RemoteIO AudioUnits, possible to have 2?
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copied!<p>I'm trying to do this </p> <p><strong>RemoteIO1 (for recording to buffer) -> kAudioUnitType_Mixer -> RemoteIO2 (for playback of output)</strong> </p> <p><strong>RemoteIO1</strong> is used for 2 purposes :</p> <p>1) To feed audio into the mixer channel 0</p> <p>2) To record audio from mic to a buffer </p> <p><strong>kAudioUnitType_Mixer</strong> </p> <p>1) Takes audio from RemoteIO - input 0</p> <p>2) Mixes the audio from (1) with audio from the buffer - input1</p> <p><strong>RemoteIO2</strong></p> <p>1) Takes the mixed audio and sends it to playback </p> <p>Initially I thought that I could just playback from mixer output but the following gives me an error. Can I confirm that I need another RemoteIO to do playback? </p> <pre><code>// Enable Mixer for playback status = AudioUnitSetProperty(_mixerUnit, kAudioOutputUnitProperty_EnableIO, kAudioUnitScope_Output, mixerOutputBus, &flag, sizeof(flag)); if (noErr != status) { NSLog(@"Enable Mixer for playback error"); return; } </code></pre> <p>Also, I did the following test and realised there seems to be only one RemoteIO available (addresses for inputComponent and inputComponent2 are the same) </p> <pre><code>// Get component AudioComponent inputComponent = AudioComponentFindNext(NULL, &desc); AudioComponent inputComponent2 = AudioComponentFindNext(NULL, &desc); </code></pre> <p>Is it true that I can only have one instance of RemoteIO in my app? If so, what are the alternatives for the 2nd RemoteIO? </p> <p>Thanks. </p> <p>Pier. </p>

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