10-26-2018, 04:42 AM
No idea how you would do this. Probably a similar approach to that plugin: do it intercepting ALSA. But, as is also the case with that plugin, you would need to not use the softvol approach and select the card directly, at which point you would have both Moode and Spotify wrestling for volume control of the device, which I wouldn't recommend.
You are in for a rough ride here.
You are in for a rough ride here.