Ключевые слова: alarm, background, bar, black, box, clicking, clock, control, counting, detail, equipment, exercise, finger, hour, indicator, instrument, isolated, learning, machine, measuring, melody, meter, metronome, minute, modern, motion, music, musical, musician, note, old, pendulum, pointer, practice, pyramid, rehearsal, rhythm, scale, singing, sound, speed, spring, studio, study, swing, tempo, time, timer, train, triangle, vintage, violin, white,