> Per Toft wrote:
>
>> Lee Revell wrote:
>>
>>> On 5/21/07, Per Toft <per@xxxxxxxxxx> wrote:
>>>
>>>> Hi!
>>>>
>>>> I have huge problems enabling surround on a VIA VT1617A sound card using
>>>> the ALSA via82xx module.
>>>>
>>>> The problem is that i have sound on the front left & right speaker, but
>>>> nothing on the others (center and rear). The problem is the same when im
>>>> using analog smart 5.1 (3 mini jacks) or S/PDIF Coax digital out.
>>>>
>>>> e.g. when i run:
>>>> speaker-test -Dplug:iec958 -c6
>>>> i hear sound in the two front speakers and nothing i the others.
>>>>
>>> This can't work because SPDIF only supports two channels.
>>>
>>> What happens when you try "speaker-test -Dplug:surround51 -c6"?
>>>
>>> Lee
>>>
>> Hi Lee,
>>
>> S/PDIF is digital output and i support more than two channels. My
>> decoder supports Dolby Digital and DTS and it works perfectly under windows.
>>
>> When i run:
>> speaker-test -Dplug:surround51 -c6
>> i get output in two channels (front left/right).
>>
>>
>> Per
>>
>
> S/PDIF supports either two PCM (uncompressed) channels or passthrough of
> lossily encoded multichannel (up to 8 channels can be used then afaik).
>
> speaker-test, as you tried to run it, is generating 6 PCM (uncompressed)
> streams, and as S/PDIF can only carry 2 PCM channels then you only near
> two of them out of your speakers.
>
> "Dolby Digital" and DTS are both lossy (some audio quality is lost to
> save filesize/bandwith) formats which Windows, and probably ALSA, can
> pass directly over the digital link to be decoded by your speakers' decoder.
>
> The things which *should* work for multichannel are:
> * Enabling digital passthrough and sending undecoded AC3/DTS straight to
> your reciever
> * Using 3 (analogue) stereo cables to connect your PC to your speakers,
> you'll then need to use the surroundXX family of devices. Probably
> surround51
>
> -ol
>
>
Hi again,
When i use AC3 pass-through to the SPDIF from mplayer i get no signal...
Will try to investigate further.
Have also tried using the three analogue and speakertest:
speaker-test -Dplug:surround51 -c6
Sound in front left and right. No other.
mythtv@epia:~$ aplay -L
front:CARD=V8237,DEV=0
VIA 8237, VIA 8237
Front speakers
surround40:CARD=V8237,DEV=0
VIA 8237, VIA 8237
4.0 Surround output to Front and Rear speakers
surround41:CARD=V8237,DEV=0
VIA 8237, VIA 8237
4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=V8237,DEV=0
VIA 8237, VIA 8237
5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=V8237,DEV=0
VIA 8237, VIA 8237
5.1 Surround output to Front, Center, Rear and Subwoofer speakers
iec958:CARD=V8237,DEV=0
VIA 8237, VIA 8237
IEC958 (S/PDIF) Digital Audio Output
null
Discard all samples (playback) or generate zero samples (capture)
mythtv@epia:~/Surround-SDL-testfiles$ amixer
Simple mixer control 'Master',0
Capabilities: pvolume pswitch pswitch-joined
Playback channels: Front Left - Front Right
Limits: Playback 0 - 31
Mono:
Front Left: Playback 22 [71%] [-13.50dB] [on]
Front Right: Playback 22 [71%] [-13.50dB] [on]
Simple mixer control 'Master Mono',0
Capabilities: pvolume pvolume-joined pswitch pswitch-joined
Playback channels: Mono
Limits: Playback 0 - 31
Mono: Playback 23 [74%] [-12.00dB] [on]
Simple mixer control 'Headphone',0
Capabilities: pvolume pswitch pswitch-joined
Playback channels: Front Left - Front Right
Limits: Playback 0 - 31
Mono:
Front Left: Playback 23 [74%] [-12.00dB] [on]
Front Right: Playback 23 [74%] [-12.00dB] [on]
Simple mixer control '3D Control - Center',0
Capabilities: volume volume-joined
Playback channels: Mono
Capture channels: Mono
Limits: 0 - 15
Mono: 0 [0%]
Simple mixer control '3D Control - Depth',0
Capabilities: volume volume-joined
Playback channels: Mono
Capture channels: Mono
Limits: 0 - 15
Mono: 0 [0%]
Simple mixer control '3D Control - Switch',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'PCM',0
Capabilities: pvolume pswitch pswitch-joined
Playback channels: Front Left - Front Right
Limits: Playback 0 - 31
Mono:
Front Left: Playback 31 [100%] [12.00dB] [on]
Front Right: Playback 31 [100%] [12.00dB] [on]
Simple mixer control 'Surround',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 31
Mono:
Front Left: Playback 31 [100%] [0.00dB] [on]
Front Right: Playback 31 [100%] [0.00dB] [on]
Simple mixer control 'Center',0
Capabilities: pvolume pvolume-joined pswitch pswitch-joined
Playback channels: Mono
Limits: Playback 0 - 31
Mono: Playback 31 [100%] [0.00dB] [on]
Simple mixer control 'Center/LFE Exchange',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'LFE',0
Capabilities: pvolume pvolume-joined pswitch pswitch-joined
Playback channels: Mono
Limits: Playback 0 - 31
Mono: Playback 31 [100%] [0.00dB] [on]
Simple mixer control 'Line',0
Capabilities: pvolume pswitch pswitch-joined cswitch cswitch-exclusive
Capture exclusive group: 0
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: Playback 0 - 31
Front Left: Playback 0 [0%] [-34.50dB] [off] Capture [off]
Front Right: Playback 0 [0%] [-34.50dB] [off] Capture [off]
Simple mixer control 'CD',0
Capabilities: pvolume pswitch pswitch-joined cswitch cswitch-exclusive
Capture exclusive group: 0
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: Playback 0 - 31
Front Left: Playback 0 [0%] [-34.50dB] [off] Capture [off]
Front Right: Playback 0 [0%] [-34.50dB] [off] Capture [off]
Simple mixer control 'Mic',0
Capabilities: pvolume pvolume-joined pswitch pswitch-joined cswitch
cswitch-exclusive
Capture exclusive group: 0
Playback channels: Mono
Capture channels: Front Left - Front Right
Limits: Playback 0 - 31
Mono: Playback 0 [0%] [-34.50dB] [off]
Front Left: Capture [off]
Front Right: Capture [off]
Simple mixer control 'Mic Boost (+20dB)',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [on]
Simple mixer control 'Mic Select',0
Capabilities: enum
Items: 'Mic1' 'Mic2'
Item0: 'Mic1'
Simple mixer control 'Video',0
Capabilities: cswitch cswitch-exclusive
Capture exclusive group: 0
Capture channels: Front Left - Front Right
Front Left: Capture [off]
Front Right: Capture [on]
Simple mixer control 'Phone',0
Capabilities: pvolume pvolume-joined pswitch pswitch-joined cswitch
cswitch-exclusive
Capture exclusive group: 0
Playback channels: Mono
Capture channels: Front Left - Front Right
Limits: Playback 0 - 31
Mono: Playback 0 [0%] [-34.50dB] [off]
Front Left: Capture [on]
Front Right: Capture [off]
Simple mixer control 'IEC958',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [on]
Simple mixer control 'IEC958 Output',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [on]
Simple mixer control 'IEC958 Playback AC97-SPSA',0
Capabilities: volume volume-joined
Playback channels: Mono
Capture channels: Mono
Limits: 0 - 3
Mono: 3 [100%]
Simple mixer control 'PC Speaker',0
Capabilities: pvolume pvolume-joined pswitch pswitch-joined
Playback channels: Mono
Limits: Playback 0 - 15
Mono: Playback 0 [0%] [-45.00dB] [off]
Simple mixer control 'Aux',0
Capabilities: pvolume pswitch pswitch-joined cswitch cswitch-exclusive
Capture exclusive group: 0
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: Playback 0 - 31
Front Left: Playback 0 [0%] [-34.50dB] [off] Capture [off]
Front Right: Playback 0 [0%] [-34.50dB] [off] Capture [off]
Simple mixer control 'Mono Output Select',0
Capabilities: enum
Items: 'Mix' 'Mic'
Item0: 'Mic'
Simple mixer control 'Capture',0
Capabilities: cvolume cswitch cswitch-joined
Capture channels: Front Left - Front Right
Limits: Capture 0 - 15
Front Left: Capture 0 [0%] [0.00dB] [on]
Front Right: Capture 0 [0%] [0.00dB] [on]
Simple mixer control 'Mix',0
Capabilities: cswitch cswitch-exclusive
Capture exclusive group: 0
Capture channels: Front Left - Front Right
Front Left: Capture [off]
Front Right: Capture [off]
Simple mixer control 'Mix Mono',0
Capabilities: cswitch cswitch-exclusive
Capture exclusive group: 0
Capture channels: Front Left - Front Right
Front Left: Capture [off]
Front Right: Capture [off]
Simple mixer control 'Alternate Level to Surround Out',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'Downmix LFE and Center to Front',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'Downmix Surround to Front',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'External Amplifier',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [on]
Simple mixer control 'Input Source Select',0
Capabilities: enum
Items: 'Input1' 'Input2'
Item0: 'Input2'
Simple mixer control 'Input Source Select',1
Capabilities: enum
Items: 'Input1' 'Input2'
Item0: 'Input2'
Simple mixer control 'Smart 5.1 Select',0
Capabilities: enum
Items: 'LineIn Mic1' 'LineIn Mic1 Mic3' 'Surr LFE/C Mic3' 'LineIn
LFE/C Mic3' 'LineIn Mic2' 'LineIn Mic2 Mic1' 'Surr LFE Mic1' 'Surr LFE
Mic1 Mic2'
Item0: 'Surr LFE Mic1 Mic2'
Simple mixer control 'VIA DXS',0
Capabilities: pvolume
Playback channels: Front Left - Front Right
Limits: Playback 0 - 31
Mono:
Front Left: Playback 31 [100%] [-48.00dB]
Front Right: Playback 31 [100%] [-48.00dB]
Simple mixer control 'VIA DXS',1
Capabilities: pvolume
Playback channels: Front Left - Front Right
Limits: Playback 0 - 31
Mono:
Front Left: Playback 31 [100%] [-48.00dB]
Front Right: Playback 31 [100%] [-48.00dB]
Simple mixer control 'VIA DXS',2
Capabilities: pvolume
Playback channels: Front Left - Front Right
Limits: Playback 0 - 31
Mono:
Front Left: Playback 31 [100%] [-48.00dB]
Front Right: Playback 31 [100%] [-48.00dB]
Simple mixer control 'VIA DXS',3
Capabilities: pvolume
Playback channels: Front Left - Front Right
Limits: Playback 0 - 31
Mono:
Front Left: Playback 31 [100%] [-48.00dB]
Front Right: Playback 31 [100%] [-48.00dB]
Oliver Lupton wrote:
>
-------------------------------------------------------------------------
This SF.net email is sponsored by DB2 Express
Download DB2 Express C - the FREE version of DB2 express and take
control of your XML. No limits. Just data. Click to get it now.
http://sourceforge.net/powerbar/db2/
_______________________________________________
Alsa-user mailing list
Alsa-user@xxxxxxxxxxxxxxxxxxxxx
https://lists.sourceforge.net/lists/listinfo/alsa-user
