Maybe elfchief doesn't want chord.wav to play on the hi-fi system, so doesn't set the DAC as the default device
Sure, I could change the default every time I fire up Spotify, but that's annoying and I really shouldn't have to do it -- this kind of setup is not that unusual for music lovers, and it's not a difficult feature to add.
It lets you set an app to use a default audio device, which may solve your issue with spotify. Some apps just ignore it, and only play through the system default though.