Hi all,

I wonder if there's any limit to the number of input buses a 
kAudioUnitType_Mixer can use. I empirically found that buses higher than ~8 are 
discarded. That means that I can mix up to 7 inputs but the 8th and higher are 
silent in the output mix.


I tried with kAudioUnitSubType_MultiChannelMixer, kAudioUnitSubType_StereoMixer 
and kAudioUnitSubType_3DMixer sub-types. All input buses are set to mono 
44100hz and the mixer output is stereo.


I got the same behavior regardless whether I connected other nodes to the mixer 
input buses or using render input callbacks.


We are calling setting setting the kAudioUnitProperty_ElementCount property 
with the right value (e.g. 11 buses).


Does anyone have an idea of what's going on? I was thinking about using N 
number of mixers and connecting them to a master mix but that sounds like a 
hack to me and I'd love to understand what's going on first.


Thanks

Marcelo



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