Unwanted downmixing to stereo.

[puntloos]

Sorry if this has been asked before, couldnt find it w/ searching.

For some reason Openelec stopped properly supporting surround when it has to do the work itself.
Meaning - AC3/DTS passthrough to my receiver still works fine, but surround FLAC or AAC gets downmixed to stereo, even though my receiver supports surround.

Full logs attached but In particular:
Receiver: (Onkyo 705) supports LPCM and many surround channels.
20:57:32 T:139657853511552 NOTICE: m_channels : FL,FR,LFE,FC,BC,BL,BR,FLOC,FROC,BLOC,BROC,TFC,TC,TFL,TFR,UNKNOWN1
20:57:32 T:139657853511552 NOTICE: m_sampleRates : 32000,44100,48000,88200,96000,176400,192000
20:57:32 T:139657853511552 NOTICE: m_dataFormats : AE_FMT_S32NE,AE_FMT_S16NE,AE_FMT_S16LE,AE_FMT_LPCM,AE_FMT_DTSHD,AE_FMT_TRUEHD
,AE_FMT_EAC3,AE_FMT_DTS,AE_FMT_AC3,AE_FMT_AAC

Source file: 5.1 channel FLAC (96K, 24B too)
22:07:15 T:139657853511552 INFO: ffmpeg[7F04A0BFA780]: Stream #0:0: Audio: flac, 96000 Hz, 5.1(side), s32 (24 bit)

But then Openelec says
22:07:16 T:139657765447424 DEBUG: CAESinkALSA::GetChannelLayout - Input Channel Count: 2 Output Channel Count: 2
22:07:16 T:139657765447424 DEBUG: CAESinkALSA::GetChannelLayout - Requested Layout: FL,FR

Eek. So suddenly somewhere openelec/kodi downmixed to stereo.

This worked before (1-2 years ago, previous version of openelec/xbmc) on exactly the same hardware; in particular I used to tell XBMC *not* to use passthrough but I forced 5.1 LPCM by saying that was the only supported format my receiver could handle.

Thoughts?

[fritsch]

Thx for cutting all the relevant parts out of your logfile and not even mentioning which hardware / software version you use.

[puntloos]

No problem, I figured it would save you some time not seeing all the script log stuff but fine, full log attached, enjoy.

Computer: Mac Mini 6,1 (https://en.wikipedia.org/wiki/Mac_Mini#Specifications_3) which has an Intel HD4000
Receiver: Onyo TX-SR705 receiver.
Software: Openelec 5.0.8

Xorg.0.log: http://sprunge.us/PHKT
xrandr: http://sprunge.us/DNHe
kodi.log: http://sprunge.us/JELQ

As noted before but worth repeating I think: it worked before on the same hardware. Also, in this case I was playing a 5.1 FLAC file, but the same problem happens with a video file that doesn't have DTS or AC3 but say multichannel AAC. (In the case of AAC I don't expect passthrough but just 5.1LPCM sent to receiver)

From the kodi.log it seems reasonably clear that (even though it is the same-and-only HDMI plug on the system) Kodi is detecting my receiver on Device 6 while Device 5 is more representative of the actual capabilities of the receiver. (it's 24/192 7.1, supports TrueHD, DTS-MA, AC3, DTS and LPCM amongst others)

Finally just FYI, MacBookPro, xbox360 and PS3 all detect the surround capabilities of the receiver correctly, so my theory is that the device detection of HD4000 is screwed up somehow.

Let me know if you need more logs.

[puntloos]

Any thoughts? How can I make Kodi recognize my receiver capabilities properly?

[puntloos]

Test. Test. Is this microphone on?
(something that Kodi failed to do properly, it seems)

[lrusak]

System --> System --> audio output.
Check your settings. Also check to make sure you have the settings level set to advanced or higher to be able to see the passthrough options.

see, http://kodi.wiki/view/Settings#Settings_levels
and, http://kodi.wiki/view/Settings/System#Audio_output