FIELD: musical instruments.
SUBSTANCE: proposed invention relates to keyboard musical instruments, in particular to electronic and mechanical devices. Musical instrument keyboard comprises at least two sets of keys arranged close to each other, wherein keys of similar tones and halftones of different octaves form groups, wherein each group includes keys of the same notes from "C" note to "B" note of different octaves.
EFFECT: invention provides for more convenient use of the tool.
1 cl, 7 dwg
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