Conversation so far:
What occurred Philharmonia Orchestra during the last decade?
In 2008 Esa-Pekka Salonen became the Philharmonia Orchestra's fifth principal conductor.
what was recorded by the Philharmonia Orchestra under principal conductor Esa-Pekka Salonen?
In 2009 the Philharmonia Orchestra began a collaboration with the record label Signum, with the release of a live recording of Schoenberg's Gurrelieder

Question: Who was a conductor?
Self-contained rewrite: Who was a conductor for the Philharmonia Orchestra live recording of Schoenberg's Gurrelieder?