[PROBLEM] No audio on many AAC files

[IngoVals]

(9th Jan, 2014 01:34 AM)IriDium Wrote:  Ok - I've got the file - so you can delete it from Dropbox.

I've tried in on my Beta 2 RPi and it plays perfectly Video (via HDMI) and Audio (via analog).

I would try plugging in some headphones into the analog port and see if you get sound there.

If not, then it looks like you will have to look at upgrading. (If you have a spare SDHC card, try installing a fresh Beta 2 first and see if that improves things).

OK I'll look into that. I should be able to easily try analog with either headphones or just straight into the receiver.

Do you have good knowledge on how digital audio works. I always assumed that the audio itself would be decoded in the Raspberry Pi itself and just some standard audio signal then sent to the receiver.

I'm however now getting the vibe that in some cases a digital signal is sent to the receiver and interpreted there. This is the case with digital 5.1 at least and then would need the receiver to support that standard like DTS for example or in this case AAC.

Could you point me towards something that explains this in layman's terms?
Did you notice if the sample I got you supported 5.1 or was just regular stereo?