[sciurius]

Precisely. And only Companion will have to deal with the actual files. When sending the song file to the device, the file names are gone and the data is included. No tablet editing of filenames that can go wrong, no additional files on the tablet that must be kept track of.

I've made a proof-of-concept implementation in the ChordPro program that seems to work well. It may need another night sleep, though.
Stay tuned.