Arch Linux

danichan

Member

Registered: 2016-05-22

Posts: 1

ALSA IEC958 volume control

Hi,

I've tried to configure volume control bar with alsa in my machine. I have a asus sonar DSX.  The master volume bar in alsamixer and kmix only works with analog output. I tried to figure out how i can configure softvol in asound file with no achieve.

i think the sound device has not hw volume control, not pvolume capability there.

Simple mixer control 'IEC958',0
  Capabilities: pswitch pswitch-joined
  Playback channels: Mono
  Mono: Playback [on]

aplay -l
lsmod
amixer

null
    Discard all samples (playback) or generate zero samples (capture)
pulse
    PulseAudio Sound Server
default:CARD=DSX
    Xonar DSX, Multichannel
    Default Audio Device
sysdefault:CARD=DSX
    Xonar DSX, Multichannel
    Default Audio Device
front:CARD=DSX,DEV=0
    Xonar DSX, Multichannel
    Front speakers
surround21:CARD=DSX,DEV=0
    Xonar DSX, Multichannel
    2.1 Surround output to Front and Subwoofer speakers
surround40:CARD=DSX,DEV=0
    Xonar DSX, Multichannel
    4.0 Surround output to Front and Rear speakers
surround41:CARD=DSX,DEV=0
    Xonar DSX, Multichannel
    4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=DSX,DEV=0
    Xonar DSX, Multichannel
    5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=DSX,DEV=0
    Xonar DSX, Multichannel
    5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=DSX,DEV=0
    Xonar DSX, Multichannel
    7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=DSX,DEV=0
    Xonar DSX, Multichannel
    IEC958 (S/PDIF) Digital Audio Output
**** List of PLAYBACK Hardware Devices ****
card 0: DSX [Xonar DSX], device 0: Multichannel [Multichannel]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: DSX [Xonar DSX], device 1: Digital [Digital]
  Subdevices: 1/1
  Subdevice #0: subdevice #0


lsmod|grep snd
snd_virtuoso           45056  2
snd_oxygen_lib         36864  1 snd_virtuoso
snd_mpu401_uart        16384  1 snd_oxygen_lib
snd_rawmidi            28672  1 snd_mpu401_uart
snd_seq_device         16384  1 snd_rawmidi
snd_pcm                86016  1 snd_oxygen_lib
snd_timer              28672  1 snd_pcm
snd                    65536  11 snd_timer,snd_pcm,snd_rawmidi,snd_virtuoso,snd_oxygen_lib,snd_mpu401_uart,snd_seq_device
soundcore              16384  1 snd


Simple mixer control 'Master',0
  Capabilities: pvolume pswitch pswitch-joined
  Playback channels: Front Left - Front Right - Rear Left - Rear Right - Front Center - Woofer - Side Left - Side Right
  Limits: Playback 135 - 255
  Mono:
  Front Left: Playback 255 [100%] [0.00dB] [on]
  Front Right: Playback 255 [100%] [0.00dB] [on]
  Rear Left: Playback 255 [100%] [0.00dB] [on]
  Rear Right: Playback 255 [100%] [0.00dB] [on]
  Front Center: Playback 255 [100%] [0.00dB] [on]
  Woofer: Playback 255 [100%] [0.00dB] [on]
  Side Left: Playback 255 [100%] [0.00dB] [on]
  Side Right: Playback 255 [100%] [0.00dB] [on]
Simple mixer control 'Headphone',0
  Capabilities: pvolume pswitch pswitch-joined
  Playback channels: Front Left - Front Right
  Limits: Playback 61 - 127
  Mono:
  Front Left: Playback 127 [100%] [on]
  Front Right: Playback 127 [100%] [on]
Simple mixer control 'Front Mic',0
  Capabilities: cswitch cswitch-joined
  Capture channels: Mono
  Mono: Capture [off]
Simple mixer control 'Line',0
  Capabilities: cswitch cswitch-joined
  Capture channels: Mono
  Mono: Capture [off]
Simple mixer control 'Mic',0
  Capabilities: cswitch cswitch-joined
  Capture channels: Mono
  Mono: Capture [off]
Simple mixer control 'IEC958',0
  Capabilities: pswitch pswitch-joined
  Playback channels: Mono
  Mono: Playback [on]
Simple mixer control 'IEC958 Loopback',0
  Capabilities: pswitch pswitch-joined
  Playback channels: Mono
  Mono: Playback [off]
Simple mixer control 'IEC958 Validity Check',0
  Capabilities: cswitch cswitch-joined
  Capture channels: Mono
  Mono: Capture [off]
Simple mixer control 'Aux',0
  Capabilities: cswitch cswitch-joined
  Capture channels: Mono
  Mono: Capture [off]
Simple mixer control 'ADC Filter',0
  Capabilities: cenum
  Items: 'None' 'High-pass Filter'
  Item0: 'None'
Simple mixer control 'Analog Input Monitor',0
  Capabilities: pvolume pvolume-joined pswitch pswitch-joined
  Playback channels: Mono
  Limits: Playback 0 - 1
  Mono: Playback 1 [100%] [0.00dB] [off]
Simple mixer control 'Digital Input Monitor',0
  Capabilities: pvolume pvolume-joined pswitch pswitch-joined
  Playback channels: Mono
  Limits: Playback 0 - 1
  Mono: Playback 1 [100%] [0.00dB] [on]
Simple mixer control 'Input',0
  Capabilities: cvolume
  Capture channels: Front Left - Front Right
  Limits: Capture 165 - 255
  Front Left: Capture 165 [0%]
  Front Right: Capture 165 [0%]
Simple mixer control 'Level Control',0
  Capabilities: cenum
  Items: 'None' 'Peak Limiter' 'Automatic Level Control'
  Item0: 'None'
Simple mixer control 'Noise Gate',0
  Capabilities: cswitch cswitch-joined
  Capture channels: Mono
  Mono: Capture [off]
Simple mixer control 'Stereo Upmixing',0
  Capabilities: enum
  Items: 'Front' 'Front+Surround' 'Front+Surround+Back' 'Front+Surround+Center/LFE' 'Front+Surround+Center/LFE+Back'
  Item0: 'Front'

So, i guess the only think i can do is set softvol properly. Any ideas?

Alsa config is a very big ass pain to me because i dont understand quite well yet. The documentation i've read (alsa-project, alsa-opensrc) is slightly
  ambiguous to me.

pcm.!default {
     type plug
     slave.pcm "softvol"
}
pcm.softvol {
     type softvol
     slave.pcm  {
          pcm "hw:0,1" ← that is digital device
     }
     control  {
          name "Altmaster"
           card 0
     }
}

any clues?

Thanks in advance.

Last edited by danichan (2016-05-22 23:18:06)