Volumio, Spotify Connect, IQaudIO DAC volume mapping

Hi there!

I’m experiencing some volume issues with my installation of Volumio 2 and Spotify Connect on my raspberry pi 3B. I’m using the IQaudIO DAC+.

The volume mapping is not working as it should, below 50% of volume, I cant hear anything at all, both for Volumio and Spotify Connect. Is there a way to fix this? Another issue I’m experiencing is when I switch between Spotify Connect to Volumio (Airplay), the volume seems to drop. To fix this I have to touch the volume slider, to reset the audio to the right volume. Any idea’s what could be the issue here, and how to fix it?