Taking Liberties: cadenzas and improvisation.
Imaginary Concerts: Critic at Large essay on fictional composers (subscription required).
Book Bench post to accompany the above.
Critic's Notebook: Les Huguenots at Bard.
New Yorker Blog: Schumann's Fourth Piano Sonata.
New Yorker Blog: The Bernstein Files.
Infinite Playlist: high-end audio online.
Audio companion to the above.
Critic's Notebook: Lawrence Brownlee at Caramoor.