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 vary in volume and length depending on how hard or long the bellows are pressed. Each Soundbellow is color-coded according to its pitch, providing a visual aid for teaching and learning music theory and melodies. In addition, each Soundbellow is labeled with its corresponding note and features a cap color that indicates its position: black for middle position and gray for high position. The notation follows the international standard, meaning the note B corresponds to the German H.