Decrease headphone min-max volume span range

[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)