The Tesseract is an interactive music box that uses generative techniques to sequence the playback of pre-recorded elements of a musical corpus. Through user interaction, structural grammars are arranged, leading to unique interpretations of prearranged musical components. The interface is designed to foster heuristic development and quickly leads to an effective mix of intuitive and indeterminate responses, offering creativity while maintaining a degree of tonal, timbral and rhythmical hierarchy.