Hello,
Tried MyVolumio for a few days with my Rasberry but my USB-CD-Player seems to be not supported.
With the NANOCD-Plugin it works perfect.
The Brand is TechPulse120 and it’s a slotin Model.
Is there a difference in the drivers ? 
So I’m back to the free Version.
mfg , hjf
Tried again with the latest Version of Volumino and now it works