Only 1-2% of piano students worldwide ever reach “diploma” level — the black belt of music — and it usually takes about 12 years. At Payam Khastkhodaei’s school, creator Payam Khastkhodaei says, 96% of students get there in just four years. 60 Minutes @60Minutes · 2026-05-24 你的浏览器不支持视频播放。 0:00 / --:--