Stuart Dempster, the iconic Northwest trombonist, gets some attention for his 90th birthday, including a November 9 celebration from Seattle Modern Orchestra that we preview in this show, with help from Pauline Oliveros, William O. Smith, Relâche and Deep Listening Band. Plus we continue our deep dive into Donnacha Dennehy’s new orchestral album and Trevor Bača’s new setting of Samuel Beckett’s Stirrings Still with the JACK String Quartet. And Anna Webber extends the Braxtonian wing of the Downtown avant-garde, Gellért Szabó channels Johannes Brahms, Daan Vandewalle plays Rzewski, and Wadada Leo Smith performs in a trio and an octet. An ambitious acousmatic gem by François Bayle rounds out the program for its 50th anniversary. Creative and improvised music with host Michael Schell from 91.3 KBCS.FM.