Franz Schubert: Piano Quintet in A Major, The Trout The Original Source Series - Marking their 125th anniversary, Deutsche Grammophon is launching a new and very special audiophile series on vinyl. The Original Source Series = no copy used, no extra devices in the signal pass, no digital sound processing at all; more clarity, more detail and far less noise; pure analog. Produced on virgin 180-gram vinyl by Optimal, these limited and numbered releases will be issued in deluxe gatefold editions featuring the original artwork and liner notes.