This collection, which opens with an "aria" theme, was famously recorded and performed by Canadian pianist Glenn Gould.
The twenty-fifth section of this composition was called the "black pearl" of the piece by Wanda Landowska, and the penultimate section is a quodlibet hypothesized to be a family in-joke. With the exception of the fifteenth, twenty-first, and twenty-fifth sections, this entire work is in the key of G major. With the exception of the last portion of this composition, every third "movement" is a (*) canon. This collection, which opens with an "aria" theme, was famously recorded and performed by Canadian pianist Glenn Gould. For 10 points, name this set of works apocryphally used to lull Count Kaiserling to sleep, a work of Johann Sebastian Bach named after a fellow composer.
The twenty-fifth section of this composition was called the "black pearl" of the piece by Wanda Landowska, and the penultimate section is a quodlibet hypothesized to be a family in-joke.
{Goldberg} Variations