Audio recordings are an archive of a performance. As an archive, they cannot be changed; they embody certain choices on the part of the performers and the producers. Thus, a recording only allows certain interpretations to be heard at a later date, even if the source material itself is open to a plethora of expositions. We are developing tools that allow a single recording to encapsulate multiple interpretations: a new phrase here, and entirely new performance there. These new mutable recordings will give performers the chance to present a variety of interpretations to the listener, while allowing the listener to have new experiences each time she listens to the piece.