Arch Linux

Yaule

Member

Registered: 2015-08-02

Posts: 10

microphone/recording issue (alsa,jitsi)

I tested jitsi, but the output of my micro was only noise (a few weeks ago all went fine). Then tested some things with alsa and found out that it records with 2 channels normally:

arecord -d 5 -c2 test.wav

but with 1 channel I get only noise:

arecord -d 5 -c1 test.wav

output of arecord -l:

**** Liste der Hardware-Geräte (CAPTURE) ****
Karte 0: NVidia [HDA NVidia], Gerät 0: CS4206 Analog [CS4206 Analog]
  Sub-Geräte: 1/1
  Sub-Gerät #0: subdevice #0

output of arecord -L:

null
    Discard all samples (playback) or generate zero samples (capture)
default:CARD=NVidia
    HDA NVidia, CS4206 Analog
    Default Audio Device
sysdefault:CARD=NVidia
    HDA NVidia, CS4206 Analog
    Default Audio Device
front:CARD=NVidia,DEV=0
    HDA NVidia, CS4206 Analog
    Front speakers
surround21:CARD=NVidia,DEV=0
    HDA NVidia, CS4206 Analog
    2.1 Surround output to Front and Subwoofer speakers
surround40:CARD=NVidia,DEV=0
    HDA NVidia, CS4206 Analog
    4.0 Surround output to Front and Rear speakers
surround41:CARD=NVidia,DEV=0
    HDA NVidia, CS4206 Analog
    4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=NVidia,DEV=0
    HDA NVidia, CS4206 Analog
    5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=NVidia,DEV=0
    HDA NVidia, CS4206 Analog
    5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=NVidia,DEV=0
    HDA NVidia, CS4206 Analog
    7.1 Surround output to Front, Center, Side, Rear and Woofer speakers

output of amixer:

Simple mixer control 'Master',0
  Capabilities: pvolume pvolume-joined pswitch pswitch-joined
  Playback channels: Mono
  Limits: Playback 0 - 127
  Mono: Playback 95 [75%] [-16.00dB] [on]
Simple mixer control 'Headphone',0
  Capabilities: pvolume pswitch
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 127
  Mono:
  Front Left: Playback 74 [58%] [-20.50dB] [on]
  Front Right: Playback 74 [58%] [-20.50dB] [on]
Simple mixer control 'Speaker',0
  Capabilities: pvolume pswitch
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 127
  Mono:
  Front Left: Playback 112 [88%] [-1.50dB] [on]
  Front Right: Playback 112 [88%] [-1.50dB] [on]
Simple mixer control 'Bass Speaker',0
  Capabilities: pvolume pswitch
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 127
  Mono:
  Front Left: Playback 112 [88%] [-1.50dB] [on]
  Front Right: Playback 112 [88%] [-1.50dB] [on]
Simple mixer control 'PCM',0
  Capabilities: pvolume
  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 'Mic Boost',0
  Capabilities: volume
  Playback channels: Front Left - Front Right
  Capture channels: Front Left - Front Right
  Limits: 0 - 3
  Front Left: 3 [100%] [30.00dB]
  Front Right: 3 [100%] [30.00dB]
Simple mixer control 'IEC958',0
  Capabilities: pswitch pswitch-joined
  Playback channels: Mono
  Mono: Playback [on]
Simple mixer control 'IEC958 Default PCM',0
  Capabilities: pswitch pswitch-joined
  Playback channels: Mono
  Mono: Playback [on]
Simple mixer control 'Capture',0
  Capabilities: cvolume cswitch
  Capture channels: Front Left - Front Right
  Limits: Capture 0 - 63
  Front Left: Capture 63 [100%] [12.00dB] [on]
  Front Right: Capture 63 [100%] [12.00dB] [on]
Simple mixer control 'Auto-Mute Mode',0
  Capabilities: enum
  Items: 'Disabled' 'Enabled'
  Item0: 'Enabled'
Simple mixer control 'Digital',0
  Capabilities: cvolume
  Capture channels: Front Left - Front Right
  Limits: Capture 0 - 120
  Front Left: Capture 120 [100%] [30.00dB]
  Front Right: Capture 120 [100%] [30.00dB]

alsa-base.conf

options snd-hda-intel model=mbp55

Is there a way to fix it in general or to force jitsi to use 2 channels?
I read in the last few days much about alsa and its configuration, but couldn't figure out how to solve my problem.

Yaule

Member

Registered: 2015-08-02

Posts: 10

Re: microphone/recording issue (alsa,jitsi)

anyone?