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Reputation: 997

Alsamixer cannot increas mic gain above 0dB

I'm unable to increase the output of a USB mic. The sound is very clean, so it can be amplified, but it remains low w.r.t. other sources. I'd like alsamixer to boost the volume, but despite my attempts, it only allows a range of [-50dB, 0dB], like so (my highlighting):

enter image description here

asound.conf:

defaults.pcm.card 1
defaults.ctl.card 1

pcm.mic_hw {
    type hw
    card 2
    device 0
}

pcm.mic {
    type softvol
    slave.pcm mic_hw
    control {
        name "Boost Capture Volume"
        card 2
    }
    min_dB -2.0
    max_dB 30.0
}

I also tried to remove /var/lib/alsa/asound.state (Debian-like distro) and modprobe -r snd-usb-audio snd-hda-intel. After re-inserting the modules, all card numbers changed, but the ranges alsamixer allows did not.

Obviously, the above configuration is wrong. How can I fix it?

Upvotes: 0

Views: 31

Answers (0)

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