I’m using a DAC (AudioQuest DragonFly) which has a very loud master volume when combined with headphones. It is not possible to adjust the volume on the device itself.
Therefore I can only use the first three notches on the audio volume, everything else is too loud (I know I can use ⌥⇧ together with the volume buttons to get 1/4 of the volume adjustments, but I’d rather just use the volume buttons as is because that’s where my muscle memory is).
Is it possible to adjust the master volume of an output device in macOS so that I can use the full range of volume adjustment when using the volume keys? If so, how can I achieve this?