bitlisz Wrote:Finally i get some TrueHD resources.
TrueHD 7.1 playback was fine, but I find that in TrueHD 5.1, 48/24
4 channels are mixed (I can hear only):
2 - Rear Left <-> 4 - Center
3 - Rear Right <-> 5 - LFE

(I have)
But during these speaker test are ok, good mapped:
speaker-test -Dhdmi -c6 -r48000 -FS32_LE
speaker-test -Dhdmi -c6 -r96000 -FS32_LE
speaker-test -Dhdmi -c6 -r192000 -FS32_LE
speaker-test -Dhdmi -c8 -r48000 -FS32_LE
speaker-test -Dhdmi -c8 -r96000 -FS32_LE
speaker-test -Dhdmi -c8 -r192000 -FS32_LE
(on -FS32_LE with high freq i get sometimes "Write error: -32...")

How can i fix this?

______________________
Also i noticed that when i start movie the there is an error with audio device init,
I have to switch to some another audio, like ac3, and back, then its ok.

UPDATE: If i switched off navigation sound than this error not occured...

pbjr Wrote:Hi,

Same issue as well with 7.1 audio. I was able to modify the /etc/asound.conf file to fix it for 7.1, but once you do that it screws up 5.1 sources.

I have since given up on Linux for my BD MKV's. A recent update to MakeMKV now allows saving the HD Audio. I have since pre-ordered a HDi BD Dune 3.0. I'll be able to bitstream HD Audio to my receiver (no need to convert to flac) and also be able to play BD ISO's and Folders with full menus as well. Still love my XBMC. I think nvidia and alsa will fix the audio issues. I really hope for the day we can bitstream HD on Linux (getting jealous of those ATI windows guys).

PBjr.

bitlisz Wrote:please test with 7.1 linear pcm audio:
speaker-test -D hw:0,3 -t wave -c 8 -f cd
or
speaker-test -Dhdmi -c6 -r192000 -FS32_LE

peterkant Wrote:Interesting to mention, everything worked right out of the box. And I mean EVERYTHING. Lirc, 5.1 over HDMI, SMB, etc. All those lousy little things that in the past took me a day or two to make it work after an install.

bitlisz Wrote:This HDMI on ION just started a while ago and it seems They are really working on the fixes:
The "whole" story"

This is about the channel map issue
So this issue can be solved temporary if I make another remap?
Strange thing if I play 5.1 flac/wav/wma/ogg... the channel map correct...problem only with ddtruehd 5.1...but have to test again.
UPDATE:
It seems i have similar same problem like this, so maybe xbmc related:
Ticket #7196 (new Bugs) - AAC 5.1 Audio sent to wrong channels

So the leftover only DTS-HD...at least these are always contains the full rate DTS core.

myrison Wrote:Guys -

I posted a few weeks back thanking Alan for this guide and I just as well do it again as I'm still running well on 99% of my files. Thanks Alan.

The one exception is related to flv files, which are almost entirely trailers downloaded for movies. I get no audio from these files. This happens whether I play them with VLC, XBMC, etc.

Here is a snippet of my XBMC debug log that indicates issues with PulseAudio... Given that I'm supposed to be using Alsa, I'm not sure if this is meaningful, but it's the only possible clue I can find in my logs.

The audio encoded in this file is mp3, and mp3s work fine if played by themselves, so I think it's related to the flv extension, not to the audio format... though I could be wrong.

Has anyone else run into this or do you have any clues on getting sound from flv files to work? I've marked a few lines below in red that I believe are relevant...

Den4t Wrote:Hi !

As many users i have problems with channel mappings, after some experiments i
found solution for me, bun not test it actively.
First, adding some code to ALSADirectSound.cpp, for right mapping 8 chan. flac & pcm:
else if (strstr(strAudioCodec, "DMO") || strstr(strAudioCodec, "FLAC") || strstr(strAudioCodec, "PCM"))
{
if(iChannels == 6)
deviceuse = "xbmc_win51:'" + EscapeDevice(deviceuse) + "'";
else if(iChannels == 5)
deviceuse = "xbmc_win50:'" + EscapeDevice(deviceuse) + "'";

>>this 2 lines added - new mapping in xbmc asound.conf
>> else if(iChannels == 8)
>> deviceuse = "xbmc_win71:'" + EscapeDevice(deviceuse) + "'";

}

this mapping in xbmc asound.conf file:
pcm.xbmc_win71 {
@args.0 SLAVE
@args.SLAVE {
type string
default "default"
}
type route
slave {
pcm $SLAVE
channels 8
}
ttable {
0.0= 1
1.1= 1
2.4= 1
3.5= 1
4.2= 1
5.3= 1
6.6= 1
7.7= 1
}
}

For right 5.1 AAC mapping i use this one, instead of original:
pcm.xbmc_aac51 {
@args.0 SLAVE
@args.SLAVE {
type string
default "default"
}
type route
slave {
pcm $SLAVE
channels 6
}
ttable {
0.0= 1
1.1= 1
2.4= 1
3.5= 1
4.2= 1
5.3= 1
}
}

and of course, i use alsa patch and system alsa mapping from this thread,
thanks Alan !

myrison Wrote:Thanks for posting. What is your setup on which you found this change necessary? (i.e. Linux version, hardware, Nvidia driver, etc.)

Thanks.

Den4t Wrote:Hi !

As many users i have problems with channel mappings, after some experiments i
found solution for me, bun not test it actively.
First, adding some code to ALSADirectSound.cpp, for right mapping 8 chan. flac & pcm:
else if (strstr(strAudioCodec, "DMO") || strstr(strAudioCodec, "FLAC") || strstr(strAudioCodec, "PCM"))
{
if(iChannels == 6)
deviceuse = "xbmc_win51:'" + EscapeDevice(deviceuse) + "'";
else if(iChannels == 5)
deviceuse = "xbmc_win50:'" + EscapeDevice(deviceuse) + "'";

>>this 2 lines added - new mapping in xbmc asound.conf
>> else if(iChannels == 8)
>> deviceuse = "xbmc_win71:'" + EscapeDevice(deviceuse) + "'";

}

this mapping in xbmc asound.conf file:
pcm.xbmc_win71 {
@args.0 SLAVE
@args.SLAVE {
type string
default "default"
}
type route
slave {
pcm $SLAVE
channels 8
}
ttable {
0.0= 1
1.1= 1
2.4= 1
3.5= 1
4.2= 1
5.3= 1
6.6= 1
7.7= 1
}
}

For right 5.1 AAC mapping i use this one, instead of original:
pcm.xbmc_aac51 {
@args.0 SLAVE
@args.SLAVE {
type string
default "default"
}
type route
slave {
pcm $SLAVE
channels 6
}
ttable {
0.0= 1
1.1= 1
2.4= 1
3.5= 1
4.2= 1
5.3= 1
}
}

and of course, i use alsa patch and system alsa mapping from this thread,
thanks Alan !

bitlisz Wrote:I have tried your solution, but not work fine.
Im pretty sure that not correct the channel mapping with truehd5.1 (maybe only with AAC, but i dont think so, maybe some channel still mixed)
Check this sample: DDTrueHD 5.1 (I will reupload if deleted)