[mythtv-users] MythTV 0.24 HDMI audio problem
adeffs.mythtv at gmail.com
Sat Nov 27 22:16:18 UTC 2010
On Sat, Nov 27, 2010 at 4:51 PM, Steven Adeff <adeffs.mythtv at gmail.com> wrote:
> On Sat, Nov 27, 2010 at 4:04 PM, Jean-Yves Avenard <jyavenard at gmail.com> wrote:
>> On Sunday, November 28, 2010, Steven Adeff <adeffs.mythtv at gmail.com> wrote:
>>> On Wed, Nov 24, 2010 at 4:27 PM, Steven Adeff <adeffs.mythtv at gmail.com> wrote:
>>>> On Wed, Nov 24, 2010 at 10:06 AM, Jean-Yves Avenard <jyavenard at gmail.com> wrote:
>>>>> The fixes have been backported to 0.24-fixes.
>>>>> If you use an HDMI TV or amplifier that only supports stereo PCM but
>>>>> supports 5.1 with AC3/DTS; you will have to go in the Audio Settings
>>>>> and check Advance Audio Configuration and Stereo PCM only.
>>>> Great, will give it a go and let you know. Thanks for the work JYA!
>>> I've updated to the 27352 mythbuntu auto-build.
>>> What I've noticed: when I scan and use ALSA:hdmi:CARD=NVidia_1 I get
>>> the following frontend output
>>> 2010-11-27 12:16:34.373 AFD: Opened codec 0x971a5b90, id(H264) type(Video)
>>> 2010-11-27 12:16:34.374 AFD: codec AC3 has 1 channels
>>> 2010-11-27 12:16:34.375 AFD: Opened codec 0x971b1d30, id(AC3) type(Audio)
>>> 2010-11-27 12:16:34.588 AO: Opening audio device 'hdmi:CARD=NVidia_1'
>>> ch 2(1) sr 48000 sf signed 16 bit reenc 0
>>> 2010-11-27 12:16:34.617 AudioPlayer: Enabling Audio
>>> but no sound over HDMI
>>> If I go back to use the old ALSA:hw:1,7 I get sound, AC3/DTS look to
>>> work properly, and my HD music plays properly. So it looks like it's
>>> all good minus the general ALSA issue with device scanning, but thats
>>> not your issue to deal with.
>>> Thanks JYA!
>> Who broadcast AC3 mono these days?
>> You said that using the "hdmi" device in mplayer got you sound?
>> Have you tried other type of content, something not mono (should be
>> automatically converted to stereo by myth but you never know)
>> Did you make sure the device is unmuted? On my gt220, I have 4 spdif
>> device showing up and I had to unmute the 2nd one to get audio
> I've never wanted to throw something out the window more than I do right now.
> I don't know what I did, but now things seem to be working.
> Actually, I can tell you what I did. I was having another "issue" I
> decided to fix since I didn't know what more to do until you had a
> chance to respond. What I have is my Myth frontend running via HDMI to
> my pre-amp which then connects to the TV. Because of this chain and
> how my pre-amp works if the receiver and tv were off when turning on
> Myth, X would get no video edid information and then start up at
> 800x600. So I decided to capture the TV edid directly (reconnect the
> HDMI cables temporarily) to a file and have the nvidia driver load
> that custom edid. So I got that working (easy) after a reboot.
> So I figured I'd keep playing around. This time when I scanned I got
> these devices as options:
> with devices 3,7,8,9!
> so I tried 7 and lo and behold, it works! well, it works with DEV=7
> for AC3/DTS and 48KHz stereo, but now my HD audio (24/96) gets down
> converted. in the audio setup myth says device 3, 8 and 9 all support
> AC3/DTS/LPCM but that device 7 only supports AC3/LPCM.
> But this seems to be an ALSA issue because if I try to play the HD
> audio via mplayer it also downconverts.
> I'm going to keep playing and see if I can't get this to work properly still...
> oh, the single channel AC3 is from Fox Soccer Channel, I don't know
> why they do that...
well, a step in the right direction. updated the motherboard firmware
and now I can disable the onboard sound so alsa only sees the GT220
of course, this doesn't help with alsa. I'm back to the ricotz ppa and
it works. but no 96/24 output. going to try and compile from scratch
again and see, as i think this was the setup that worked for 24/96
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