24 FLAC Discount With their project ‘The Duplex Coupler Grand Piano’, Florian Uhlig and David Stromberg breathe new life into a forgotten concept. The composer Emánuel Moór, whose works combine wonderful melodies and surprising harmonic twists, developed the ‘Duplex Coupler Piano’ that incorporated a double keyboard. With keys coupled at the octave, this enabled works to achieve special shades of sound. The unique instrument is featured in this recording by David Stromberg and Florian Uhlig of cello sonatas by Moór, Dohnányi and Richard Strauss.