Originally Posted by Deathmetalconga
Hardest string instrument is the violin. Hardest wind instruments are the French horn, oboe and flute, because it takes an immense amount of practice just to be able to make a pleasing sound.
Hardest percussion instrument is the tabla drums of Indian classical music.
Violin, and tabla, yes.
Wind? dunno.. My 'windbags' tell me its the clarinet...something about the unique & highly complex arrangement of the keys and the fingering is insane.