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I can't get microphone work[solved]
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pd1986
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PostPosted: Wed Oct 03, 2012 7:53 pm    Post subject: I can't get microphone work[solved] Reply with quote

Hello,

When I first installed gentoo in my laptop (about 6 months ago), I am pretty sure that my microphone worked well. And I could use "Sound recorder" (in xfce4) to get my sound recorded. I recently installed skype in my laptop but the microphone didn't work. When I went back to test my microphone by "sound recorder", there was no sound recorded either. When I increased the Mic boost volume bar in alsamixer, I could clearly hear the noise from the speaker. I also have "Mic" in my alsamixer, it seems work with Mic boost together, since when I decrease the bar to the minimum, there was no noise.
there are just 4 options for the sound input, Mic boost, Capture, Digital, and Internal Mic
I am not sure which I used as the sound input. But I tried all, none of them could give the sound recorded.

I don't where the problem is. the kernel may also be the sources too. I don't know.

There it is the output of amixer scontents. Thanks for your help

Code:
Simple mixer control 'Master',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 'Headphone',0
  Capabilities: pvolume pswitch penum
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 64
  Mono:
  Front Left: Playback 64 [100%] [1.00dB] [on]
  Front Right: Playback 64 [100%] [1.00dB] [on]
Simple mixer control 'Speaker',0
  Capabilities: pvolume pswitch penum
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 64
  Mono:
  Front Left: Playback 64 [100%] [1.00dB] [on]
  Front Right: Playback 64 [100%] [1.00dB] [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 'Mic',0
  Capabilities: pvolume pswitch penum
  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 'Mic Boost',0
  Capabilities: volume penum
  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 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 'Capture',0
  Capabilities: cvolume cswitch penum
  Capture channels: Front Left - Front Right
  Limits: Capture 0 - 46
  Front Left: Capture 46 [100%] [29.00dB] [off]
  Front Right: Capture 46 [100%] [29.00dB] [off]
Simple mixer control 'Auto-Mute Mode',0
  Capabilities: enum
  Items: 'Disabled' 'Enabled'
  Item0: 'Enabled'
Simple mixer control 'Digital',0
  Capabilities: cvolume penum
  Capture channels: Front Left - Front Right
  Limits: Capture 0 - 120
  Front Left: Capture 0 [0%] [-30.00dB]
  Front Right: Capture 0 [0%] [-30.00dB]
Simple mixer control 'Internal Mic',0
  Capabilities: pvolume pswitch penum
  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 'Internal 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]


Last edited by pd1986 on Wed Oct 03, 2012 10:28 pm; edited 1 time in total
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pd1986
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PostPosted: Wed Oct 03, 2012 7:58 pm    Post subject: Reply with quote

I just verified, it's gnome sound recorder
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mir3x
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PostPosted: Wed Oct 03, 2012 10:03 pm    Post subject: Reply with quote

You have to enable capture ( it looks like its off ) - press F4 in alsamixer and maybe increase mic boost above 0 ( 0 dB = 1 anyway so it should work witout boost )
EDIT : Im not sure if in alsamixer I can enable capture I can increase only, but deinitily I can do that in kmix, try some gnome mixer maybe ?
it will work for 100% when amixer will show [on] on capture device.
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pd1986
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PostPosted: Wed Oct 03, 2012 10:24 pm    Post subject: Reply with quote

mir3x wrote:
You have to enable capture ( it looks like its off ) - press F4 in alsamixer and maybe increase mic boost above 0 ( 0 dB = 1 anyway so it should work witout boost )
EDIT : Im not sure if in alsamixer I can enable capture I can increase only, but deinitily I can do that in kmix, try some gnome mixer maybe ?
it will work for 100% when amixer will show [on] on capture device.


yes, we can enable capture in alsamixer by "SPACE". You were right for capture, but after several tests, I have to enable capture and digital and mic boost, all the three to record. Thanks. problem solved
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pd1986
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PostPosted: Wed Oct 03, 2012 10:29 pm    Post subject: Reply with quote

sorry, mic boost is not necessary
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