Norbert Putnam Posted on October 1, 2014December 10, 2014 by royerlabs Piano – SF-12 Engineer: Norbert Putnam Recorded at Norbert Putnam’s Cadre Entertainment, Memphis, TN. One SF-12 stereo ribbon microphone over the soundboard of a Yamaha C-7 piano. “Impromptu Op.90, No 2” (Franz Schubert) Your Browser does not support the new HTML5 Audio-Tag, sorry!