Sonata Arctica | Autumn Sonata | Sonata | Hyundai Sonata | sonata | Winter Sonata | The Ghost Sonata | Kreutzer Sonata | "Waldstein" Sonata | Trio sonata | Tokyo Sonata | The Kreutzer Sonata | "Spring" sonata | sonata (music) | ''Sonata for Solo Cello'' | Nightmare Sonata | "Moonlight" Piano Sonata No. 14 in C-sharp minor | ''Hammerklavier'' Sonata | Devil's Trill Sonata | Cello Sonata (Shostakovich) | cello sonata | ''Appassionata'' Sonata |
The theme music for the show was the 2nd movement from Beethoven's "Pathétique" Sonata (Sonata No 8 in C minor), performed by Haas himself; and Haas started every show with his trademark greeting "Hello everyone."
His chamber music recordings, include DVDs of Beethoven's "Spring" sonata with Igor Gruppman, Brahms' Viola Sonata in F minor with Vesna Gruppman, and a recital with legendary violinist Ida Haendel at the Miami International Piano Festival.
In January 2001, in a recital at the City Recital Hall in Sydney, he played Beethoven's Hammerklavier Sonata.
He appeared at the Hollywood Bowl with conductors such as Sir John Barbirolli and Leopold Stokowski, and he played the sound track (Beethoven's Appassionata Sonata) for the Bette Davis 1946 film Deception.
At age 11, he was asked to perform Beethoven's "Waldstein" Sonata at the Kimmel Center for the Performing Arts' Master Class Series.