Chamber Symphony No. 1 E major op. 9

'Composed between the spring of 1906 and July of the same year, the Chamber Symphony op. 9 for 15 solo instruments represents a point of culmination in Schoenberg's artistic development, the consequences of which not even the composer himself initially recognised.'
Ulrich Krämer

'The 1914 version is not chamber music - however its sound is simply less aggressive than the later version. It is more limpid, lucid, less incisive, and that allows the voices to emerge more clearly.' (Philippe Jordan, 2012)