A portable piano
Solo per fare un pianoforte
自制便携式钢琴
自分で作ったポータブルピアノ
자기가 만든 휴대용 피아노
Today, I made myself a violin wooden tuning device for my own piano.
i'm Use My Wooden hammer To Test String So This is the B tune string
我觉得下面还需要增加几条低音吉他弦、这样我能够配合适应大调小调高音部低声部的演奏
これはB調です