His treatment of the cycle of Beethoven's piano sonatas has been highly acclaimed.
He is also noted for his recordings of the music of Johann Sebastian Bach.
In collaboration with other performers, Roberts released discs of music for one and two pianos by Paul Hindemith and of trios by Frank Bridge.
According to Roberts' official home page, he has been the subject of a 40-minute BBC2 documentary, and he "particularly enjoys performing the piano trio repertoire with his sons Andrew and Nicholas".
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