For the “Pirate Audio: Headphone Amp for Raspberry Pi”, how do you control volume from the command line or from mpd
?
E.g., alsa mixer gives “This device has no controls”. There are various threads online with people trying to fix this, but no fixes I could follow.
The device works:
> aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: sndrpihifiberry [snd_rpi_hifiberry_dac], device 0: HifiBerry DAC HiFi pcm5102a-hifi-0 [HifiBerry DAC HiFi pcm5102a-hifi-0]
Subdevices: 1/1
Subdevice #0: subdevice #0
But e.g.,
> sudo pactl list sinks
Connection failure: Connection refused
pa_context_connect() failed: Connection refused
For example,
mpc status
shows that the volume is not available for setting.
Any ideas?