https://rayxbass.com/rhythmtraining http://basslesson.toruhoshino.com/how-to-practice-walking-bass-with-metronome/ https://m.youtube.com/watch?v=om7m33vDC-g 右手について↓ https://m.youtube.com/watch?v=WKRRhZjTqVA https://btree-music-school…

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