一部音割れしてるかも 不協和音かもしれない（相対音感だけどプチ音痴）
① https://musiclab.chromeexperiments.com/Song-Maker/song/5559774904713216 ② https://musiclab.chromeexperiments.com/Song-Maker/song/6326356572504064 ③ https://musiclab.chromeexperiments.com/Song-Maker/song/6300088552521728 ④ https://musiclab.chromeexperiments.com/Song-Maker/song/5898806536830976
