Tom Service of The Guardian writes about last Saturday’s Hear and Now on BBC Radio 3. The programme focused on Karlheinz Stockhausen’s Gruppen and took “a closer look at the German composer's electronic masterpiece from the same period, Gesang der Jünglinge,” featuring excerpts from previously unbroadcast session tapes. The stream will be online until Sunday.

Talking about Gruppen: here is Andrew Clement’s review of the London Sinfonietta’s performance of the piece for 3 orchestras (the orchestra was joined by the Royal Academy of Music’s Manson Ensemble), conducted by Martyn Brabbins, Baldur Brönnimann and Geoffrey Paterson. Plus there is a collection of reviews from the orchestra’s own blog.