Beethoven did in fact rework his violin concerto into a piano concerto, but nowhere is this referred to as "Concerto #6." Robbins Landon mentions some sketches for a sixth concerto and laments the fact that no patron or publisher pushed the issue to make LvB finish it. There have been at least two recordings of it, one with Felicja Blumental and one with Peter Serkin. Aaron J. Rabushka [log in to unmask] http://www.cowtown.net/users/arabushk/