Audio Upload not possible
Seems like audio-files can't be uploaded to the community, when "video-upload" in fluent-player-settings is deactivated.
If you try - the audio-upload icon is still shown - an error-message "you can't upload videos.." is shown in the right corner, as soon as you choose a file and click on upload.
Bug or on purpose?
Thanks for reporting this, it's a bug: audio uploads need Video Upload turned on for now (which also allows videos), and a separate audio permission is coming in an upcoming update.