This paper reports on the experimental use of a recently developed musical looping app with a class of Japanese university students of English during 2014. Working in groups using shared hand-held devices, students created compositions based on lexical chunks or formulaic sequences selected freely from a fixed text. A scored example of one such group composition is included in the paper. During research, the author acted as instructor and a participant/observer role afforded an intimate view of the educational process. Self-assessment questionnaires prior to and post working with Loopy indicate that students experienced increased confidence in their ability to produce spoken English over a three-month period. The affordances and constraints of using the musical app to learn English are examined and a significant increase in speech rate when reading from a fixed text is also noted.