Far away, he could hear the sound of someone playing an accordion.

VOA: special.2009.06.27

It doesn't sound much like a tuba because it's actually playing in the higher register of the instrument, but it is a tuba.

它听起来不太像是低音号,因为它一般,会在更高音域演奏,但它确实是低音号

耶鲁公开课 - 聆听音乐课程节选

So Musorgsky knew this law of acoustics because he was a professional musician and was playing off of it to create this rather unusual and remarkable musical sound-scape here.

穆索尔斯基明白这个声学规律,因为他是位专业的音乐家,他通过制造这非凡卓越的音乐场景,表达了这个规律

耶鲁公开课 - 聆听音乐课程节选