For quite some time, the complete cycle of Rachmaninov's preludes with Ashkenazy has been in the car cd and I have often played it when I have taken my children home from kindergarden and school. My son Oliver, who is 3 1/2, wants it on when we drive home but today, I had Chopin's etudes on with Cziffra and he immediately recognized that it was the wrong CD and wanted me to change. So I did and he was happy again. Then I changed to Chopin and another etude which he did not hear yet and he within a couple of seconds knew it was wrong. Changed back to another random Rach prelude and he was happy again. Changed to another etude of op.25 of Chopin and the same reaction so I changed to another random Rach and so I tried a couple of times. He always knew, within a few seconds, whether it was Rach or not and with no exceptions. Isn't it quite remarkable that a 3 1/2 can directly tell Rach from Chopin? Next time, I will nother CD:s (perhaps the Rach etudes and Bach) and see if he still can differ Rach from other composers.