Competition for the title is intense, but I would ask that serious consideration be given to this CD of Wilhelm Furtwängler's Piano Quintet, which appeared on the Bayer label in 1996. The work is an immensely earnest mishmash of Brahms, Franck, Bruckner, and Reger, full of unmemorable ideas developed at unrelenting length. The performance is wretched. The recording is badly made. And it goes on and on and on — for seventy-three minutes and twenty-three seconds, to be exact. It's the only disc of late-Romantic chamber music that makes me laugh out loud. I provide an audio sample to back up my case.
In the interest of equal time, here is Furtwängler conducting the Berlin Philharmonic in the Coriolan Overture:
