Apple

So far I have had zero success, is this even possible? I was first using a MultiChannelMixer, and after many fruitless hours googling, searching the headers and docs I determined it is not possible, at least not to my limited ability and knowledge.

So I switched to using the AU3DMixerEmbedded, which I naively assumed I could simply set the azimuth on to get the desired effect. However when I try I get a kAudioUnitErr_InvalidParameter error. The header does state that "only some of these parameters are available in the embedded implementation of this AU" but no where do I find which are and which are not. Seems silly to me that this parameter would not be supported.

So what am I doing wrong? Surely there must be a way to achieve such a simple effect.

- (OSStatus)panTrack:(Float32)pan track:(int)num

{

//kAudioUnitParameterUnit_Pan

//pan is -1->1

Float32 azimuth = 180.0 * pan;

NSLog(@"Panning Azimuth of track %d to %f", num, azimuth);

status = AudioUnitSetParameter(mMixerUnit,

k3DMixerParam_Azimuth,

kAudioUnitScope_Output,

num,

azimuth,

0);

checkStatus(status);

return status;

}

My AUGraph looks like this [file data] ->3D mixer -> Multichannel Mixer(for "master" volume con) -> remoteIO output ->[sound!]

AudioUnitGraph 0xDBAD003:

Member Nodes:

node 1: 'auou' 'rioc' 'appl', instance 0xd331c0 O I

node 2: 'aumx' '3dem' 'appl', instance 0xd34430 O I

node 3: 'aumx' 'mcmx' 'appl', instance 0xd4a1d0 O I

Connections:

node 3 bus 0 => node 1 bus 0 [2 ch, 44100 Hz]

node 2 bus 0 => node 3 bus 0 [2 ch, 44100 Hz]

Input Callbacks:

{0x6ba6, 0xd31c20} => node 2 bus 0 [1 ch, 44100 Hz]

{0x6ba6, 0xd31c20} => node 2 bus 1 [1 ch, 44100 Hz]

{0x6ba6, 0xd31c20} => node 2 bus 2 [1 ch, 44100 Hz]

thanks a bunch!

-raleigh