Re: no sound in headphones

[Emanoil Kotsev <deloptes@yahoo.com>]

Liviu Andronic wrote:

> On 9/20/09, Emanoil Kotsev <deloptes@yahoo.com> wrote:
>> nothing is wrong - you may have many input/outputs. you have to figure
>> out
>>  which controls are for the headphones. Unfortunately it depends on your
>>  card. Mostprobably you have to assign the correct output to your
>>  application.
>>
>>  In alsamixer I see many headphone controls and if I plug into the
>>  headphone jack it works fine
>>
> In the mixer (both alsa and xfce) I have only one  "Headphones" volume
> control. Probably irrelevant, I also have "IEC958" switches and
> "IEC958 Playback Source" options; no idea what these are for.
> 
> I am not familiar with JACK. I just tried starting it from qjackctl,
> but JACK failed to start.
> 
> 
>>  amixer | grep Head
>>  Simple mixer control 'Headphone',0
>>  Simple mixer control 'Headphone as Line Out',0
>>  Simple mixer control 'Headphone',1
>>
> liviu@debian-liv:~$ amixer | grep Head
> Simple mixer control 'Headphone',0
> 
> This is the relevant part from amixer:
> Simple mixer control 'Headphone',0
>   Capabilities: pvolume pswitch
>   Playback channels: Front Left - Front Right
>   Limits: Playback 0 - 64
>   Mono:
>   Front Left: Playback 60 [94%] [-3.00dB] [on]
>   Front Right: Playback 60 [94%] [-3.00dB] [on]
> 
> As far as I can see here, the headphone levels are just fine. When
> headphones are plugged, though, the audio is simply not switched to
> these.
> 
> 
>>  Also you can play with .asounrd
>>
>>  # from http://alsa.opensrc.org/index.php/Dmix
>>  pcm.headset { # playback only on frontpanel headset
>>   type route
>>   slave.pcm dmixer
>>   slave.channels 8
>>   ttable.0.0 1 # headphones front L
>>   ttable.1.1 1 # headphones front R
>>  }
>>
> Before I try this one, would there be anything I could with the first two?
> Thank you
> Liviu

When starting multimedia application it picks up the default audio device
which is not your headset output.

you can play with aplay -D ... man aplay and findout yourself which device
id the headphone one.

aplay -L
default:CARD=Intel
    HDA Intel, STAC92xx Analog
    Default Audio Device
front:CARD=Intel,DEV=0
    HDA Intel, STAC92xx Analog
    Front speakers
surround40:CARD=Intel,DEV=0
    HDA Intel, STAC92xx Analog
    4.0 Surround output to Front and Rear speakers
surround41:CARD=Intel,DEV=0
    HDA Intel, STAC92xx Analog
    4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=Intel,DEV=0
    HDA Intel, STAC92xx Analog
    5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=Intel,DEV=0
    HDA Intel, STAC92xx Analog
    5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=Intel,DEV=0
    HDA Intel, STAC92xx Analog
    7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=Intel,DEV=0
    HDA Intel, STAC92xx Digital
    IEC958 (S/PDIF) Digital Audio Output
hdmi:CARD=Intel,DEV=0
    HDA Intel, INTEL HDMI
    HDMI Audio Output
null
    Discard all samples (playback) or generate zero samples (capture)


so if i want to use 7.1 surround system I would use surround71 etc

regards