In the Talkhouse, I review Chamber Music by Harrison Birtwistle.
Bonus tracks: Tom Service discusses Birtwistle in the Guardian. Two additional works I especially admire are The Triumph of Time for full orchestra and Carmen Arcadiae Mechanicae Perpetuum for chamber orchestra. (A live performance of Carmen Arcadiae Mechanicae Perpetuum by Alarm Will Sound in New York was one of my memorable concert experiences. )
For those sad that Ligeti only wrote a finite number of piano études, I highly recommend Harrison's Clocks. Both the Joanna MacGregor and Nicolas Hodges recordings are excellent.
There’s a nice little Sinfini Music film about Sir Harry at home where you can see him find pitches on a keyboard and beat out polyrhythms.