[PLUG] Tuning audio system

[Mike C.]

On Mon, Jun 29, 2020 at 3:03 PM Rich Shepard <rshepard at appl-ecosys.com>
wrote:

> Using the Audio-Technica AT2005USB microphone when recording a video (with
> vokoscreenNG-3.0) the output sound is very low; I need to crank the speaker
> volume to almost the maximum to hear it clearly. This should not be the
> case
> so I started learning more about linux ALSA and Pulse.
>
> Using pavucontrol I have the AT2005USB input volume set to the maximum:
> 153%.
>
> Your thoughts? (Prayers not needed.)
>

I think you're going to have to get pretty deep into the voodoo.

Just so you know exactly what you're working with, first get a list of all
microphone devices.

# arecord -l
**** List of CAPTURE Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC662 rev3 Analog [ALC662 rev3 Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 2: ALC662 rev3 Alt Analog [ALC662
rev3 Alt Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: Q9000 [QuickCam Pro 9000], device 0: USB Audio [USB Audio]
  Subdevices: 1/1

This page might help with amixer - https://alsa.opensrc.org/Record_from_mic

Here's some possibly relevant and helpful things I found there:

Limits: Playback 0 - 31 Capture 0 - 7
  Mono: Playback 23 [74%] [on] Capture 5 [71%] [off]

In this case you set Capture on with the command amixer sset Mic Capture cap.
(The Capture volume was set with the command amixer sset Mic Capture 71%.)

I hope that's helpful.