| http://www.w3.org/ns/prov#value | - two people including parents and teachers and students, useful when practicing the piano, DuetYou can also change the tempo and time signature, metronome piano lessons to helpYou can record / playback your playing, composing and recording capabilities can be utilized, such as checking the outcomes of the lessonLock button operation and prevent incorrect settings change Panel LockAdditional col
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