1592954177000 1312632483000 term-92473 1616540943667 1312632592000 1616289929279 adlib fitz-online adlib-term-92473 48ccb835-1436-397d-b213-6ecf1596a5fa 2 1 scope note Electronic percussion instruments developed in the 1930s, involving a series of rotating wheels that interrupt beams of light to produce complex rhythms very precisely, controlled from a keyboard. reference term-92463 adlib-term-92463 3cffd723-b459-3c85-9280-5e87e5112cb4 rhythmicon V.TT.AFU.ARI.ARI.ARI 1 code V.TT.AFU.ARI.ARI.ARI 1 rhythmicons reference term-92478 adlib-term-92478 50144ed7-d412-39e0-8394-417b23a8cbe0 electronic instruments reference term-92232 adlib-term-92232 b4041da2-55fd-31b9-b7f9-75cb29ba48ce keyboard instruments rhythmicons term