Fifth edition of the editorial series World Music Listening Guides. Intercultural Music Education Courses, the guide Calung: the Bamboo Ensembles of Banyumas (Central Java), created by Daniele Zappatore, is devoted to the music of Javanese calung ensembles of tuned percussion instruments. The audiovisual materials it presents were collected during the event Music and dance from the borders of Java. Calung-Lénggér Banyumasan, organised by the IISMC in 2024. With the aim of situating the practice of calung music within the broader panorama of Javanese arts, the contents are organised to highlight the distinctive features of this musical tradition – from its close connection with the ritual dance lénggér to a description of the principles that guide its lively and dynamic performance practice. From a perspective that recognises how musical knowledge is grounded in technical and material expertise, the description of the roles of the various instruments in the ensemble is accompanied by a short video documentary – based on field materials collected by the author – which illustrates the processes of constructing and tuning the bamboo instruments. The roles and functions of the instruments in a calung ensemble are illustrated in an first multimedia animation, which demonstrates the musical principles underlying performance through the integration of video and transcriptions in Javanese cipher notation (kepatihan). Two further video animations explore the performance techniques that characterise the sound of the gambang xylophones, the main melodic instruments of the ensemble: through video and real-time transcriptions, they present the workings of rhythmic-melodic interlocking (imbal) and the advanced techniques of melodic ornamentation (gambangan and onelan) on the two xylophones.