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