Copland Plays Copland - Sonata for Violin and Piano - Two Performances

I've posted this first-performance of Aaron Copland's Violin Sonata, him accompanying Ruth Posselt before.

I found this later recording of him accompanying the eminent violinist Isaac Stern made in the 1960s and thought it was interesting to compare the performances.

It's always interesting to hear a composer playing or conducting his own music, especially when they are a good enough performer to give you insights into how they thought of their music.  It's even more interesting when you can compare more than one performances of the composer playing the same piece.