PSO Guest conductor Christoph Koenig waxes philosophical about Haydn's "Philosopher" Symphony, Richard Strauss' Nietzsche-inspired "Also Sprach Zarathustra," and Richard Danielpour's "Darkness in the Ancient Valley," a tribute to the plight of the Iranian people. Koenig also gives an inkling of what to expect in the PSO's first "Behind the Notes" concert.