[PROBLEM] Spotify unreachable after DAC input change

[Tim Curtis]

IIRC none of the renderers are able to recover from loss of their USB audio output. MPD can generally recover but in my experience it's not 100% reliable.

Also be aware that there is a significant risk that when a USB audio connection goes away while a renderer is connected to moOde that ALSA volume is left at 0dB 100% volume :-0