Setting Alsa default device to HDMI

Configuration required in /etc/asound.conf - to change default audio PCM to HDMI
*# cat /etc/asound.conf
pcm.!default {
type plug
slave.pcm "hdmi:0,0"
}
* (this is the same "hdmi device" that can be found in Kodi's guisettings.xml, and in "aplay -L")
* alsactl --force restore #loads the new config; no reboot required
* to test if it was taken as 'default':
* speaker-test -c 2 -r 48000
* If this works, librespot is going to work as well
* Note that the output of aplay -L still shows "ALC892 Analog" as the default audio device - this is irrelevant