The phrase "a programme note" is correct and usable in written English.
It is typically used in the context of music, theater, or art to refer to a written explanation or commentary about a performance or exhibition.
Example: "The programme note provided insights into the composer’s intentions and the historical context of the piece."
Alternatives: "a program commentary" or "a performance note".
Phelan's strategy was set out in a programme note.
A programme note says: "The engine could, notionally, go on for ever".
Metamorphosis, Fabre suggests in a programme note, is a painful business.
Blatchley, who also directs, suggests in a programme note that our notions of Chekhov have become hidebound by Stanislavski's legacy.
Forget you've heard it "in an elevator or while waiting on the phone", he urged in a programme note.
As a programme note by the choreographer reminds us, Laura was based on Williams's sickly sister Rose, who was lobotomised and died in an institution.
They are also, as Phantasm's director Laurence Dreyfus puts it in a sparky programme note, an acquired taste: hushed, alienating, restless, zany, combative and melancholy.
We should give the last word, though, to Daniel Falk of McSweeney's Internet Tendency, who nails the art of the revival in a spoof programme note by a worn-out director.
Shakespeare certainly did not write the rebel Jack Cade as a hero; an interesting programme note by Richard Wilson explains that he may have been digging at Christopher Marlowe in his depiction of the rabblerouser.
And of course we should beware of taking it too seriously: Michael Frayn, who wrote the masterpiece Noises Off, poked fun at over-solemn theories about farce with a fake programme note for the play-within-a-play suggesting the fall or loss of trousers should be recognised as "an allusion to the fall of man and the loss of primal innocence".
A 45-minute piece in three movements, Tanz/haus: triptych 2017 came with a cryptic programme note from Dillon himself – just a quotation from Heinrich von Kleist and the etymology of the title.
