Circular sheet of metal (for use on most types of disc music boxes), cardboard (for use on certain organettes), or composition cardboard-metal (for certain organettes) on which a musical program is arranged in the form of perforations or projections extending from the underside. Almost always easily changed, so that different tunes can be played on the same instrument. * Also spelled disk. * Synonyms (not in popular usage with collectors today, however): record, tune sheet.

In a band organ or dance organ, a group of ranks of pipes devoted to a specific musical part: bass, accompaniment, melody, countermelody, etc. In a pipe organ, a group of ranks usually associated with a certain manual or manuals.

Stopped flute pipe, with two mouths oriented on opposite sides of the pipe, which produces a loud clear tone without being too shrill. A popular rank in many Wurlitzer BX and CX orchestrions. The smaller scale rank pitched an octave higher and used as a piccolo in large Popper orchestrions has a very loud, penetrating tone. * German: doppelflöte.

German term for double; hence Doppelflöte (a double-mouthed flute pipe), Doppelmechanik (double mechanism), etc.

In a disc music box, separate combs played by separate star wheels. (In contrast to duplex combs, also listed in this Glossary.)