Williams appeared on the cover CD of the June 2005 issue of BBC Music Magazine, performing works by Ludwig van Beethoven, Franz Liszt, and Franz Schubert.
He has two CDs on the Signum Classics label: a 2010 disc of music inspired by paintings or engravings, works by Mussorgsky, Debussy and Liszt and a 2012 disc of works by Liszt.