[mythtv-users] No sound via HDMI on my Yamaha RX-V465 A/V receiver

[Razorblade]

Thank you for your reply and sorry for my late reply ;-)

I finally managed to get 5.1 surround sound out of my Yamaha via HDMI.
There's no need of an asound.conf.

The problem was with the NVIDIA driver.
When using metamodes and the "Force full gpu scaling" setting is 
checked, then there's no sound on my AVR.
Simply unchecking this "Scaling" item (or disabling metamodes) does the 
trick.

I don't have any idea why this isn't working when using metamodes and 
enabling "gpu scaling".
I also figured out why I don't have sound when upgrading the kernel in 
MythDora to the latest version - it reverts back alsa to 1.0.17 - 
there's no support for my HDMI ;-)
So, when someone is about to upgrade the kernel in MythDora: keep in 
mind to compile and install the latest alsa driver. There's no 
difference for my HDMI with alsa 1.0.18a and 1.0.20.

This resolved all my further issues with mythtv: choppy sound with ac3 
when cpuspeed daemon is running, choppy video playback with internal 
player playing iso-files and audio being out of sync when using ac3 
audio in liveTV.

The settings in MythTV are:

General setup:
Playback device: ALSA:hdmi
PassThrough device: ALSA:hdmi
Max audio Channels: Stereo (seems to be some bug in myth?!)
Both PassThrough items checked

Audio setup:
Playback device: ALSA:plughw:0,3 (this is for an ASUS M3N78-VM, change 
according to aplay -l)

Thanks

Bjoern

On 07/13/2009 06:23 PM, Allen Edwards wrote:
> On Mon, Jul 13, 2009 at 7:43 AM, Razorblade<Razorblade at kabelbw.de>  wrote:
>> @ Jason
>> I did enable the one (and only) iec958 device in alsamixer.
>> This is the only device/switch in alsamixer.
>>
>> @Allen
>> Sorry if I did not describe this more clearly.
>> My Setup:
>>
>> MythBox - Yamaha - TV -->  video but no sound (Yamaha displaying "No audio
>> input Signal")
>> MythBox - TV -->  video and sound
>> Windows(on different hard drive but same box) - Yamaha - TV -->  video and
>> sound
>>
>> My hdmi plug is hw:0,3. I tried entering this in mythtv and I also tried
>> ALSA:hdmi.
>>
>> I do not have an asound.conf.
>> What do your changes do in this asound.conf?
>>
>> Bjoern
>>
>
> I documented what I know at
> http://www.mythtv.org/wiki?title=AllensDigitalAudioHowto
>
> I think you should have some kind of asound.conf file.  Read the wiki
> and see if it helps.  There are several options given that might help.
>   The format command reverses the order of the bits I believe.
> Apparently some decoders require that and some don't.
>
> Allen
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