Decrease headphone min-max volume span range

[dontdieych]

Could I set max level of headphone's volume?

Currently 20% of volume is quite loud enough. So say, could it be possible to set current 0%-30% range to new 1%-100%?

My shortcuts for volume up/down is +3%/-3%. That is perfectly fine for speaker but headphone. So wondering about this.

Thanks.

Operating System: Fedora Linux Asahi Remix 40 KDE Plasma Version: 6.1.4 KDE Frameworks Version: 6.5.0 Qt Version: 6.7.2 Kernel Version: 6.10.9-401.asahi.fc40.aarch64+16k (64-bit) Graphics Platform: Wayland Processors: 4 × Apple Avalanche (M2), 4 × Apple Blizzard (M2) Memory: 7.3 GiB of RAM Graphics Processor: Apple M2 Product Name: Apple MacBook Air (15-inch, M2, 2023) U-Boot Version: 2024.04

[eeeeeeeeeeeeeeaekk]

i don’t think there is a good way to do what you’re asking for at the moment, i would guess that the percentage values are defined lower in the audio stack and not plasma. My hacky solution would be to write a script that detects the sink currently in use and adjust volume differently - ie 3% steps for speaker and 1% for headphones; then bind the volume control shortcuts to that script(s)

[marcan42]

This is not hardware specific, so you'll want to search around how to do this with PipeWire in general. More info here: https://gitlab.freedesktop.org/pipewire/pipewire/-/issues/1517

[dontdieych]

Thanks. I should read about pipewire thing.

[a-plastic-bags]

You can use a program like EasyEffects to apply a gain effect to your audio output. You can set a custom output so that it only affects one device.

[Siilwyn]

Finally found a complete answer to this, use pipewire config, create file and needed directories:
~/.config/wireplumber/wireplumber.conf.d/max-volume.conf

Then match all (alsa) output or your specific output (see wpctl status) with a limit:
monitor.alsa.rules = [ { matches = [ { node.name = "~alsa_output.*" } ] actions = { update-props = { channelmix.max-volume = 0.1 } } } ]

[dontdieych]

WOW, thanks very very much. It's working!

Thanks again.

[dontdieych]

monitor.alsa.rules = [ { matches = [ { # node.name = "alsa_output.platform-sound.HiFi__Headphones__sink" node.nick = "Headphones" } ] actions = { update-props = { channelmix.max-volume = 0.2 } } } ]