[marvin_GS]

Hi, I have XBMC 9.11 installed on a revo 3610. The machine is connected to a receiver capable of decoding AC3 and DTS via hdmi, so XBMC directs those to the receiver and they work as intended. But I also have some videos with aac 5.1 sound. I suppose XBMC should decode and send audio to the receiver but my receiver only receive two channel audio. Also, I do not hear people when they talk, I suspect XBMC decodes aac sound well but for some reason 4 remaining channels do not reach the receiver. I wonder if I miss some configuration. Thanks in advance for any help/suggestion.

[NebulaOdyssey]

I suggest that you read the following post. It informs you about the aac codec and its support in XBMC.

http://forum.xbmc.org/showpost.php?p=388686&postcount=8

[Izod517]

You'll also have trouble with AAC 6c in MKV wrappers for sure, I had remux all of my MKVs with 6c AAC into AC3. Which I suspect that post deals with.