you tube performances : 12 Chopin Etudes Op.10; Brahms First Piano Concerto in D minor, Op.15;  Prokofiev Sonata no.7, Op.83.  You can hear them here:
http://www.youtube.com/channel/UCLbdTNI-R-NPzVcu6d94rNw/videos?view=1&flow=grid

If you want to hear individually, including the Rachmaninoff Preludes, you can find them here:
http://www.youtube.com/channel/UCLbdTNI-R-NPzVcu6d94rNw/videos?view=0&flow=grid