[fritsch]

Hehe - I also think that's something special here. Not sure if you did set a special speaker layout somewhere in the system? I am a linux dev, so I have no idea how or even if those settings can by changed by the OS.

The Channel Mapping on the DarwinOSX Sink uses a fixed lookup table

Code:

#define CA_MAX_CHANNELS 8
static enum AEChannel CAChannelMap[CA_MAX_CHANNELS + 1] = {
  AE_CH_FL , AE_CH_FR , AE_CH_BL , AE_CH_BR , AE_CH_FC , AE_CH_LFE , AE_CH_SL , AE_CH_SR ,
  AE_CH_NULL
};

All the in between channels are filled in, when e.g. a 5.1 or a 2.1 layout is needed.