I was able to get the Moode Audio install script to run no problem (*), installing Moode onto the boot SD card.
I wasn't able to get audio working to a USB DAC though, and in the process of trying to get it working it appears to have damaged itself, as I can no
longer view or set any of the configuration parameters (browser just hangs).
At any rate, Volumio is essentially the same thing isn't it?
(*) Apart from lack of feedback about what was going on and seemingly undocumented login details after the first reboot. FYI the hostname is changed to moode, username is still pi and password is moodeaudio.