Electronic memory and rhythm instrument. The calculator and watch manufacturer, Casio, developed the VL1 as a low-priced musical toy. This mini synthesizer also has rhythm, memory and calculator functionality. Only short melodies can be recorded, and its inexpensive design is also evident in the low quality of its five sounds. Nevertheless, Casio achieved great commercial success with its VL1. In fact, its trashy sounds made it into a cult instrument. In 1982, the pop group "Trio" made it world famous with their hit "Da, Da, Da".