Add a setting to choose between original and default audio

[tcely]

Do you think it is worth adding a setting to consistently choose either original or default formats?

Yes that sounds like a nice per-source toggle to have available. It's probably more of a documentation challenge rather than the feature itself to accurately communicate what it does to people.

Originally posted by @meeb in #1452 (comment)

My first idea was to just use a setting that would apply to all sources.