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gjs278
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Joined: 04 Jan 2013
Posts: 4

PostPosted: Fri Jan 04, 2013 6:46 pm    Post subject: Boost USB Microphone Capture Volume Reply with quote

Code:

Simple mixer control 'Speaker',0
  Capabilities: pvolume pswitch pswitch-joined penum
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 151
  Mono:
  Front Left: Playback 43 [28%] [-20.31dB] [on]
  Front Right: Playback 43 [28%] [-20.31dB] [on]
Simple mixer control 'Mic',0
  Capabilities: pvolume pvolume-joined cvolume cvolume-joined pswitch pswitch-joined cswitch cswitch-joined penum
  Playback channels: Mono
  Capture channels: Mono
  Limits: Playback 0 - 32 Capture 0 - 16
  Mono: Playback 32 [100%] [47.81dB] [on] Capture 16 [100%] [23.81dB] [on]
Simple mixer control 'Auto Gain Control',0
  Capabilities: pswitch pswitch-joined penum
  Playback channels: Mono
  Mono: Playback [on]


Code:

card 3: U0xd8c0x0c [USB Device 0xd8c:0x0c], device 0: USB Audio [USB Audio]
  Subdevices: 1/1
  Subdevice #0: subdevice #0


23.81db is too quiet. Much much too quiet. My device is U0xd8c0x0c. I need to boost the capture. I've looked at configs everywhere but I can't figure it out. This is my current asoundrc

Code:

ctl.!default {
   type hw
   card Intel
}

pcm.dmixed {
   type asym
   playback.pcm {
      type dmix
      ipc_key 5678293
      ipc_perm 0660
      ipc_gid audio
      slave {
         channels 6
         pcm {
            format S16_LE
            rate 48000
            type hw
            card 0
            device 0
            subdevice 0
         }
         period_size 1024
         buffer_size 8192
      }
      bindings {
         0 0
         1 1
         2 2
         3 3
         4 4
         5 5
      }
   }
   capture.pcm "hw:0"
}


What can I add to it so that U0xd8c0x0c has the option to have a higher microphone capture?
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jpc22
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Joined: 29 Jan 2012
Posts: 194

PostPosted: Sat Jan 05, 2013 1:11 am    Post subject: Reply with quote

Do you have any of mic mic boost internal internal when running #alsamixer ?
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gjs278
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Joined: 04 Jan 2013
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PostPosted: Mon Mar 04, 2013 5:07 am    Post subject: Reply with quote

sorry about the huge delay.

this is what it looks like for the device.

http://img189.imageshack.us/img189/4779/screenshotemj.png

I can't adjust the last field, only the CAPTURE (3rd column) lets me change anything.
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jpc22
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PostPosted: Wed Mar 06, 2013 11:14 pm    Post subject: Reply with quote

There not much you can improve on hardware side, so you should try software side, maybe JACK or something based on, can be used to amp up the signal from your mic.

Ii'm no linux sound expert. Do you use oss , alsa or pulseaudio?

Try pressing f4 or space when selecting mic in alsa mixer to enable capture mode and check if you get an additional bar nammed pcm.
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gjs278
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PostPosted: Sat May 11, 2013 10:31 am    Post subject: Reply with quote

Sorry again for the huge delay.

Yes, there are no options on the hardware side for this thing.

I use alsa, no sound wrapper or daemon.

I have definitely toggled f4/f5 all of that, and raised my captures to 100%. I don't have an additional bar named pcm, just speaker, mic (does nothing), microphone capture (100% - 23 db), and auto gain control (00) http://img189.imageshack.us/img189/4779/screenshotemj.png for reference again.

I was hoping to avoid any jack daemons and the like and continue using straight alsa, if anyone knows a mic boost line for asoundrc let me have it, otherwise I'll just keep talking loud for now.
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