[mythtv-users] How to get sound out via HDMI

Wed Mar 8 17:18:45 UTC 2017

Hoi Ashu,

Wednesday, March 8, 2017, 6:00:00 PM, you wrote:

> On Wed, Mar 8, 2017 at 10:44 AM, Hika van den Hoven <hikavdh at gmail.com> wrote:

> Hoi Ashu,
>  

>  Wednesday, March 8, 2017, 5:27:37 PM, you wrote:
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 >> On Wed, Mar 8, 2017 at 9:47 AM, Karl Newman <newmank1 at asme.org> wrote:
>  
 >> On Wed, Mar 8, 2017 at 6:50 AM, Ashu Desai <ashu.desai at gmail.com> wrote:
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>  
>  
 >> On Wed, Mar 8, 2017 at 7:09 AM, Daryl McDonald <darylangela at gmail.com> wrote:
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 >> On Mar 7, 2017 11:23 PM, "Ashu Desai" <ashu.desai at gmail.com> wrote:
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>  
>  
 >> On Tue, Mar 7, 2017 at 7:43 PM, Karl Newman <newmank1 at asme.org> wrote:
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 >> On Tue, Mar 7, 2017 at 5:16 PM, Ashu Desai <ashu.desai at gmail.com> wrote:
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>  
>  
 >> So I checked and there is partial success. The audio now does come
 >> out via HDMI. However, the 5.1 doesn't work. 
>  
>  
 >> It somehow thinks only 3 speakers are attached. And so F-L plays on
 >> F-L speaker. Center plays on F-L speaker. F-R plays on F-R speaker.
 >> Rear-L plays on F-L speaker and Rear-R plays on F-R speaker. 
>  
>  
 >> Pls help...!
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>  
>  
 >> In the screen shot you showed it also had a selector for the number
 >> of channels, which was set to 2 channels. Try toggling that and see
 >> if it improves. Also, there is a command-line tool for alsa called
 >> speaker-test which can help test your setup independent of MythTV.
 >> Try it with "speaker-test -c 6" (the 6 is to indicate 6 channels).
 >> You may also have to specify the device with -D.
>  
>  
 >> Karl
 >>
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 >> Sorry - but that didn't do anything.
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 >> the speake-test did the exact same thing. The sound comes out of
 >> center channel only when it thinks it's trying to go to rear and LFE.
>  
>  
 >> No sound comes at all via the rear speakers
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 >> I think the speaker test was not supposed to be a solution in
 >> itself but a way to quickly test wether a change that you've just
 >> made in sound settings is better or worse.
 >>
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 >>
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 >> Yep - I meant that showed the same thing. No change there. 
>  
>  
 >> So as it stands - the sound isn't coming out of any back speakers
 >> and not coming out right from the front speakers.
>  
>  
 >> Are your receiver/amplifier settings correct *for that input*? Is
 >> there any way to see how many channels your receiver thinks it is
 >> getting from the HDMI? (Mine shows a diagram with the active speaker channels lit up).
>  
>  
 >> Karl
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 >> My receiver is set for HDMI - and the input shows all the channels.
 >> the output diagram only shows the front ones - F-L, Center, F-R lit up
>  
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 >> And like I said - the center sound comes off the F-L, R-L comes off center, LFE comes off F-R, etc
>  
>  
 >> Is there any setting in alsa where it's supposed to be changed? Anywhere in drivers? 
 >>  
 >>
>  
>  Through amixer you can rearrange the layout of the speakers, but I
>  have no real experience there. I think there was a thread somewhere in
>  the past year about that.

> Hika
> I think THIS may be something that can be doing it! I have zero
> inkling but I will search around. The output look like this:

> -----------------------------------------------------------------

>  amixer
> Simple mixer control 'Master',0
>   Capabilities: pvolume pvolume-joined pswitch pswitch-joined penum
>   Playback channels: Mono
>   Limits: Playback 0 - 64
>   Mono: Playback 61 [95%] [-3.00dB] [on]
> Simple mixer control 'Headphone',0
>   Capabilities: pswitch penum
>   Playback channels: Front Left - Front Right
>   Mono:
>   Front Left: Playback [on]
>   Front Right: Playback [on]
> Simple mixer control 'PCM',0
>   Capabilities: pvolume penum
>   Playback channels: Front Left - Front Right
>   Limits: Playback 0 - 255
>   Mono:
>   Front Left: Playback 255 [100%] [0.00dB]
>   Front Right: Playback 255 [100%] [0.00dB]
> Simple mixer control 'Front',0
>   Capabilities: pvolume pswitch penum
>   Playback channels: Front Left - Front Right
>   Limits: Playback 0 - 64
>   Mono:
>   Front Left: Playback 64 [100%] [0.00dB] [on]
>   Front Right: Playback 64 [100%] [0.00dB] [on]
> Simple mixer control 'Front Mic',0
>   Capabilities: pvolume pswitch penum
>   Playback channels: Front Left - Front Right
>   Limits: Playback 0 - 31
>   Mono:
>   Front Left: Playback 23 [74%] [0.00dB] [on]
>   Front Right: Playback 23 [74%] [0.00dB] [on]
> Simple mixer control 'Front Mic Boost',0
>   Capabilities: volume penum
>   Playback channels: Front Left - Front Right
>   Capture channels: Front Left - Front Right
>   Limits: 0 - 3
>   Front Left: 0 [0%] [0.00dB]
>   Front Right: 0 [0%] [0.00dB]
> Simple mixer control 'Surround',0
>   Capabilities: pvolume pswitch penum
>   Playback channels: Front Left - Front Right
>   Limits: Playback 0 - 64
>   Mono:
>   Front Left: Playback 64 [100%] [0.00dB] [on]
>   Front Right: Playback 64 [100%] [0.00dB] [on]
> Simple mixer control 'Center',0
>   Capabilities: pvolume pvolume-joined pswitch pswitch-joined penum
>   Playback channels: Mono
>   Limits: Playback 0 - 64
>   Mono: Playback 64 [100%] [0.00dB] [on]
> Simple mixer control 'LFE',0
>   Capabilities: pvolume pvolume-joined pswitch pswitch-joined penum
>   Playback channels: Mono
>   Limits: Playback 0 - 64
>   Mono: Playback 64 [100%] [0.00dB] [on]
> Simple mixer control 'Line',0
>   Capabilities: pvolume pswitch penum
>   Playback channels: Front Left - Front Right
>   Limits: Playback 0 - 31
>   Mono:
>   Front Left: Playback 0 [0%] [-34.50dB] [on]
>   Front Right: Playback 0 [0%] [-34.50dB] [on]
> Simple mixer control 'IEC958',0
>   Capabilities: pswitch pswitch-joined penum
>   Playback channels: Mono
>   Mono: Playback [on]
> Simple mixer control 'IEC958 Default PCM',0
>   Capabilities: pswitch pswitch-joined penum
>   Playback channels: Mono
>   Mono: Playback [on]
> Simple mixer control 'IEC958',1
>   Capabilities: pswitch pswitch-joined penum
>   Playback channels: Mono
>   Mono: Playback [on]
> Simple mixer control 'Capture',0
>   Capabilities: cvolume cswitch penum
>   Capture channels: Front Left - Front Right
>   Limits: Capture 0 - 31
>   Front Left: Capture 9 [29%] [0.00dB] [on]
>   Front Right: Capture 9 [29%] [0.00dB] [on]
> Simple mixer control 'Capture',1
>   Capabilities: cvolume cswitch penum
>   Capture channels: Front Left - Front Right
>   Limits: Capture 0 - 31
>   Front Left: Capture 9 [29%] [0.00dB] [off]
>   Front Right: Capture 9 [29%] [0.00dB] [off]
> Simple mixer control 'Auto-Mute Mode',0
>   Capabilities: enum
>   Items: 'Disabled' 'Enabled'
>   Item0: 'Enabled'
> Simple mixer control 'Channel Mode',0
>   Capabilities: enum
>   Items: '2ch' '4ch' '6ch'
>   Item0: '6ch'
> Simple mixer control 'Input Source',0
>   Capabilities: cenum
>   Items: 'Rear Mic' 'Front Mic' 'Line'
>   Item0: 'Line'
> Simple mixer control 'Input Source',1
>   Capabilities: cenum
>   Items: 'Rear Mic' 'Front Mic' 'Line'
>   Item0: 'Line'
> Simple mixer control 'Rear Mic',0
>   Capabilities: pvolume pswitch penum
>   Playback channels: Front Left - Front Right
>   Limits: Playback 0 - 31
>   Mono:
>   Front Left: Playback 15 [48%] [-12.00dB] [on]
>   Front Right: Playback 15 [48%] [-12.00dB] [on]
> Simple mixer control 'Rear Mic Boost',0
>   Capabilities: volume penum
>   Playback channels: Front Left - Front Right
>   Capture channels: Front Left - Front Right
>   Limits: 0 - 3
>   Front Left: 2 [67%] [20.00dB]
>   Front Right: 2 [67%] [20.00dB]
> -----------------------------------------------------------------------------

These are the mixers for your internal audio just like with alsamixer.
It is its command-line version.
See:
 amixer --help
and:
 man amixer

Tot mails,
  Hika                            mailto:hikavdh at gmail.com

"Zonder hoop kun je niet leven
Zonder leven is er geen hoop
Het eeuwige dilemma
Zeker als je hoop moet vernietigen om te kunnen overleven!"

De lerende Mens