non-interleaved 32-bit floats for RemoteIO

gistfile1.cpp

    AudioStreamBasicDescription outputStreamDesc;
    outputStreamDesc.mSampleRate = 44100.;
    outputStreamDesc.mBitsPerChannel = 32;
    outputStreamDesc.mBytesPerFrame = 4;
    outputStreamDesc.mBytesPerPacket = 4;
    outputStreamDesc.mChannelsPerFrame = 2;
    outputStreamDesc.mFormatFlags = kAudioFormatFlagIsFloat | kAudioFormatFlagIsNonInterleaved;
    outputStreamDesc.mFormatID = kAudioFormatLinearPCM;
    outputStreamDesc.mFramesPerPacket = 1;
    outputStreamDesc.mReserved = 0;

    // we'd like 32-bit floats from the I/O, please
    err = AudioUnitSetProperty(mRemoteIOAU, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Input, 0, &outputStreamDesc, sizeof(outputStreamDesc));