Friday was the 150th anniversary of Serge Koussevitzky’s birth, but I had just finished recording one of my radio shows, and I couldn’t muster the energy and focus to post about it. Even a photo with a link to one of his recordings would have been something, albeit inadequate in proportion to his significance as one of the great champions of modern music and, more specifically, American music.

It’s been calculated that, between 1924 and 1944, Koussevitzky presented 162 American works, 66 of which were world premieres. On his Concerts Koussevitzky, conducted in Paris in the 1920s, he also introduced Ravel’s enduring orchestration of Mussorgsky’s “Pictures at an Exhibition” and Honegger’s “Pacific 231.” As music director of the Boston Symphony Orchestra, he gave first performances of Bartók’s Concerto for Orchestra and Copland’s “Appalachian Spring” suite.

“Kouss” was in on the ground floor at Tanglewood. He mentored Leonard Bernstein and others. When his wife, Nadia, died, he set up the Koussevitzky Music Foundation in her memory, to support and promote living composers. Early Foundation commissions yielded Britten’s “Peter Grimes” and Messiaen’s “Turangalîla-Symphonie.”

Kouss began his career as a double-bassist and blossomed into one of the most important conductors of the 20th century. I was remiss in not acknowledging him on his birthday anniversary. Mea culpa, and happy 150, Serge Koussevitzky!

First recording of “Pictures at an Exhibition”

Broadcast premiere of Bartók’s Concerto for Orchestra (with the original wet-noodle ending, soon to be revised by the composer)

Live performance of Sibelius’ Symphony No. 7

Roy Harris’ Symphony No. 3

Tchaikovsky’s Symphony No. 5

Rehearsing the BSO in Rimsky-Korsakov’s “Scheherazade”

Filmed performance of Randall Thompson’s “The Last Words of David”

Playing the slow movement of his Double-Bass Concerto, with piano

10-minute documentary, “The Story of Tanglewood” (1949)

Serge Koussevitzky, holding hat, with (left to right) Olivier Messiaen, Aaron Copland, Leonard Bernstein (lighting up), and Lukas Foss at Tanglewood in 1949 (photo by Ruth Orkin)