Filemanager doesn't recognise my pure m4a's as music either, it is likely that this is a bug in filemanager itself as it is missing in the map [0]. Could you report a separate bug against file manager for this issue?
0 - http://bazaar.launchpad.net/~ubuntu-filemanager-dev/ubuntu-filemanager-app/trunk/view/head:/src/app/qml/content-hub/contenttyperesolver.js#L33
Filemanager doesn't recognise my pure m4a's as music either, it is likely that this is a bug in filemanager itself as it is missing in the map [0]. Could you report a separate bug against file manager for this issue?
0 - http:// bazaar. launchpad. net/~ubuntu- filemanager- dev/ubuntu- filemanager- app/trunk/ view/head: /src/app/ qml/content- hub/contenttype resolver. js#L33