The staff learning is to deepen the memory of the notes of the staff by repeating random reinforcement learning. Includes options for bass, treble, midrange, and mid-range. Please select the appropriate staff according to the specific learning situation. Learning a staff requires a lot of memory exercises. Not being able to react to notes in a short period of time means that you have mastered the staff. If you must say to what extent, it is to reflect the sound of the notes in the absence of time.
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