No volume control with Spotify.
My little workaround:
I use a cheap ir-receiver (TSOP38238) with lirc for remote-control. Installation as described in some forum-threads. My DAC is iqaudio-dac+.
Just add to the lircrc-file
begin
prog = irexec
button = volume_+
config = amixer -c1 sset 'Playback Digital' 1.5dB+
repeat = 4
end
begin
prog = irexec
button = volume_-
config = amixer -c1 sset 'Playback Digital' 1.5dB-
repeat = 4
end
