One of the collateral delights of cycling through London is the music that appears unbidden in the mind. This week I've found tunes from Bill Callahan's new album popping into my head, as well as bits of The Rite of Spring and Carmen. Both these are understandable - I've been listening to the album a lot, and KSO is currently rehearsing the Stravinsky and Bizet (in arrangement by Shchedrin) and for our next concert. This evening, though, I suddenly found "Mack the Knife" running through my mind. Why should Kurt Weill suddenly pop into my head this way? Once these things get into your consciousness, they linger. I briefly wonder if the appearance of these old tunes will interfere with my own composing - a pre-existing idea in the head must make it harder to think of an original one, I conjecture - but I decide not to worry and enjoy the moment. It is a holiday weekend coming up, after all.