We present VisualSoundtrack, a system designed as a tool for soundtrack composers to experiment with original musical content in differing musical “styles." The system allows a user to rapidly prototype musical ideas with respect to the target media (such as a film or podcast) by having him/ her input original musical motifs, capitalizing on a corpus of existing soundtrack samples to source various styles, and allowing the user to identify the most appropriate style sources for the target media by visually architecting a path through a highly abstracted feature space.