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
Who was a conductor for the Philharmonia Orchestra live recording of Schoenberg's Gurrelieder?
Philharmonia Orchestra's live recording of Schoenberg's Gurrelieder was conducted by Esa-Pekka Salonen.
Were there any other conductors for the Philharmonia Orchestra since Esa-Pekka Salonen became the fifth principal conductor in 2008?
Vladimir Ashkenazy is the Philharmonia Orchestra's conductor laureate; Christoph von Dohnányi is its honorary conductor for life. From 2017 Jakub Hrůša and Santtu-Matias Rouvali have been principal guest conductors.
what was recorded during Esa-Pekka Salonen's time as the Philharmonia Orchestra's fifth principal conductor?
Later recordings after the live recording of Schoenberg's Gurrelieder in 2009 by the Philharmonia Orchestra have ranged from the symphonic repertoire to opera and ballet.
did Esa-Pekka Salonen have a contract with the Philarmonia Orchestra?
Esa-Pekka Salonen is set to conclude his principal conductorship after the 2020–2021 season.
What was something notable that happened during the recent decades with the Philharmonia Orchestra?
In recent years the Philharmonia Orchestra's extensive international touring schedule has included appearances in China, the Czech Republic, France, Germany, Iceland, Spain, Sweden and Switzerland.

Question: what is a soundtrack?
Self-contained rewrite: what is a soundtrack?