Early on, teachers attested that Heesook Ahn "is one of those rare talents who can express something with just a few notes" Klaus Hellwig, or that she can "reproduce thoughts of the composer that he could not write into the score" Dietrich Fischer-Dieskau. Today her concert activity includes piano recitals as well as chamber concerts and song accompaniment in many European cities.
- Ferenc Liszt - Sonata in B minor, p.178
- Robert Schumann - Davidsbündlertänze, Op.6 Heft I & II
Blackmore's - Berlins Musikzimmer