The composition published as Beethoven's Opus 63 is an arrangement for piano, violin, and cello of the Opus 4 String Quintet (Day 57), but there is little evidence that Beethoven reviewed, corrected, or approved this arrangement.
#Beethoven250 Day 204
Piano Trio Arrangement of Opus 4 (Opus 63), 1806
A recording by the Trio Élégiaque. The four movements are separate.
The composition published as Beethoven’s Opus 64 is an arrangement for piano and cello of the Opus 3 String Trio (Day 52), but there is little evidence that Beethoven reviewed, corrected, or approved this arrangement.
#Beethoven250 Day 204
Cello Sonata Arrangement of Opus 3 (Opus 64), 1807
This is an Apex recording with Ansi Karttunen on a period cello and Tuija Hakkila on a modern fortepiano modeled after a five-octave Walter.