【参考音源:ミックスボイス】 https://mixedvoice-mastering.com/wp-content/uploads/2019/09/0f41d2324b13959066e8503fb64d83ad.mp3 【参考音源:ベルティングボイス】 https://mixedvoice-mastering.com/wp-content/uploads/2019/11/46d3a6444af306c78e95fb04e062a5d5.mp3