I sang in the chorus for a Kalamazoo SO (Michigan, USA) production of the 2nd Symphony years ago. I count it as one of the great experiences of my life. I remember, in particular, the final movement where the tenor part soared to an impossibly high note at a triple pianissimo. Luckily, we started rehearsals way early, because it took me weeks to get my voice up to that range, and I was one of the higher pitched tenors to begin with.