Conversation so far:
what was daniel's musical style?
In the beginning of his career, Barenboim concentrated on music of the classical era.
and did he change this style?
CANNOTANSWER.
what was significant about his musical style?
Notable classical recordings include the complete cycles of Mozart, Beethoven and Schubert's piano sonatas, and Mozart's piano concertos.
how were they received?
CANNOTANSWER.

Question: what else is known about musical style in this section?
Self-contained rewrite: Aside from Mozart, Beethoven and Schubert's piano sonatas  what else is known about musical style in the section?