mpv
Selecting Audio Output Device
Find a list of current audio output devices with aplay:
aplay -l
card 1: PCH [HDA Intel PCH], device 0: ALC233 Analog [ALC233 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
It is also possible to list the devices from mpv, this is better as it also
shows what support was compiled into the executable:
mpv --audio-device=help
List of detected audio devices:
'auto' (Autoselect device)
'alsa' (Default (alsa))
'alsa/hdmi:CARD=HDMI,DEV=0' (HDA ATI HDMI, PL2760Q/HDMI Audio Output)
Here there is one output device 0 on card 1. To select this device when using
mpv use the --audio-device command line option:
mpv --audio-device=alsa/hw:1,0
This may also be set in the configuration file for system (/etc/mpv/mpv.conf)
or user specific (~/.config/mpv/mpv.conf).
audio-device=alsa/hw:1,0