Soundtrack
The piano pieces in Yi Yi's soundtrack are mostly performed by Kaili Peng, Yang's wife. They include well-known pieces like Beethoven's Moonlight Sonata, Johann Sebastian Bach's Toccata in E minor and BWV 914. Peng also has a small cameo in the film as a concert cellist, playing the Beethoven's Cello sonata No. 1 with her husband posing as a pianist.
Read more about this topic: Yi Yi: A One And A Two