The Soundbellows SBS-DB Diatonic Set consists of eight color-coded hand bellows that together form a diatonic scale (c2-c3). They expand the Orff instrumentarium with instruments whose tones can be varied in volume and length, depending on how hard or long you press the bellows. Each Soundbellow has a specific color to match its tone, so music theory and melodies can be taught and learned with an additional visual context. In addition, all Soundbellows are also labeled with their respective note and indicate with the color of their cap also directly the position (black=middle position, gray=high position). The notation follows the international standard, so that the note B corresponds to the German H.