I recently came across this series of Cherik oneshots, I belived it ranged from pre-slash to the established relationship. Charles was a classically trained singer and Erik was a violinist (Not certain on that one). The author made this wonderful multilingual cross references on sinfonies and literature, and a particularly funny monologue on patriarchy and feminism by Erik.
If I don't stumble into it again I might haunting me... Does it sound familiar to anyone?