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jeroentjuhh · 2014-04-26, 14:32

Hi all,

Just switched over from Windows & MediaPortal to XBMC 12.3 Frodo (XBMCbuntu boot-USB drive) and I'm impressed of the out-of-the-box experience! Keep up developing this great platform guys!

However I do have one issue with playing MP3 music which I don't want to upmix to 5.1 output, as an audiophile-guy I like 2 channel music (sorry Blush

) I've connected the PC via S/PDIF (optical) to my receiver and disabled the 'Stereo upmix' option in the Audio settings. But when I play MP3 files, the output is still upmixed to all channels. Other media is playing perfectly like DTS, AC3 etc.

Why is my 2-channel audio still upmixed and how can I solve this? Maybe it is a bug which is fixed in XBMC v13 (Gotham)?

Thanks for your help, it’s highly appreciated!

Jeroen

**fritsch** · 2014-04-26, 16:06

Never knew that SPDIF upmix (which only has 2 real channels so needs AC3 encode and output) in 12.3 worked at all :-) Congratulations.

Yeah - try gotham. You can use xmbcbuntu v13 iso.

jeroentjuhh · 2014-04-27, 21:43

Thx fritsch for your reply! I've just tried gotham, but unfortunately is the 'Stereo upmix' button doing nothing for me. Whenever I enable or disable it, still the audio is upmixed Sad

Would this be the only minor issue I need to switch back to Mediaportal?

**fritsch** · 2014-04-27, 22:37

You don't need to switch anywhere, you need to read "Read that before posting" thread.

Debug Log is required.

**negge** · 2014-04-27, 23:46

Are you sure it's not your AVR that is doing the upmixing?

**fritsch** · 2014-04-28, 08:32

I think he runs pulseaudio and has set his speaker profile to 5.1 - then pulseaudio automatically upmixes anything to match that layout. But as he refues to post any logfiles - I ignored that thread.

SpaceAgeHero · 2015-01-26, 09:35

(2014-04-28, 08:32)fritsch Wrote: I think he runs pulseaudio and has set his speaker profile to 5.1 - then pulseaudio automatically upmixes anything to match that layout. But as he refues to post any logfiles - I ignored that thread.

I have this very "problem". Is there any way to disable upmixing without changing the speaker layout? I know this is probably the wrong place to ask, but Google brought me here.

**fritsch** · 2015-01-26, 09:45

Check our pulseaudio wiki entry. I documented it here.