built in mic volume is really low

tt flag

On Ubuntu 21.10 on an IMac mid-2011, the built in mic volume is really low, even when:

  • In system settings: the mic input volume fader is at max.
  • In pavucontrol: the built in mic input is at 100%
  • In alsamixer: all the input faders are at the max

but the built in mic volume is still really low.

I do pacmd list-sources :

index: 2
    name: <alsa_input.pci-0000_00_1b.0.analog-stereo>
    driver: <module-alsa-card.c>
    state: RUNNING
    suspend cause: (none)
    priority: 9039
    volume: front-left: 65536 / 100% / 0.00 dB,   front-right: 65536 / 100% / 0.00 dB
            balance 0.00
    base volume: 13076 /  20% / -42.00 dB

base volume is at 20%. I tried pacmd set-source-volume 7 65536.

but it does not change the base volume

How can I change the base volume to 100%?


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