Our Kodi install is primarily intended for video and is just a direct install from the original Kodi. So based on the version installed, you can use the exact same documentation and help sections for Kodi in general.
However, for music we recommend using the Squeezebox System with Squeezebox Server and Squeezelite. It is much more comfortable and powerful and has its own graphical interface with the Jivelite plugin. Also, its music library management works better. Check out our Audioplayer section under „Features“ in the top bar of Max2Play to see how it works.