The Crothers’ Collection of Preludes for Quarter-tone Piano(s) currently number 12 Pieces. They may be purchased through PayPal from the download page of this web site. There are Samples from each Prelude that may be previewed before purchase. The Pieces were all composed by Scott Crothers using MOTU’s Digital Performer Notation Editor and their performance rendered by MOTU’s Symphonic Instrument plugin. _Quarter-tone Piano music has previously been composed by such notable musical figures as Charles Ives, Alois Hába and Ivan Wyschnegradsky. Although Quarter-tone Pianos have been constructed over the last hundred years, they are rather scarce and expensive. Live performance of Quarter-tone Piano Music is normally accomplished by two Pianists. One plays a Piano tuned normally while the other Pianist plays a Piano tuned a Quarter-tone sharp.
[via Peter Bengtson on Google+]