Pianist Henrik Kilhamn goes through Mozart's A minor sonata's first movement in depth. It revolves around a signal rhythm as the first subject and "moto perpetuo" rolling 16th notes as the 2nd subject, and the way Mozart integrates all elements through the course of the movement - effortless but nonetheless original - is a testamony to his genius.
Youtube video: https://youtu.be/IIUoryL-qXU
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