The Well-tempered clavier, book 2. [Preludes & fugues] Nos. 3 [C# major, BWV 872] (3:10) & 22 [Bb minor, BWV 891] (4:50) / Bach
Commentary by Bruno Monsaingeon [about the concerto recording] (ca. 2 min.)
Glenn Gould [speaking & demonstrating at the piano] about the "Emperor" concerto (ca. 5 min.)
Concerto no. 5 in Eb, op. 73 : "Emperor" / Beethoven (ca. 37 min.)