Saab 9-3 2008 on, dubbed Saab XWD), and ReAxs as described above, are just a few of the features exclusive to the 9-3. On February 22, 2012, the final 47 Saabs were built. They were all 9-3 "Independence Edition" convertible models built by one of Sweden's largest car dealers, ANA, in Trollhättan. There were 21 LHD cars, and 26 RHD ones. The final Saab was a Saab 9-3 Aero Independence Edition TTiD convertible. Note: diesel engines are not available in North America. Starting from late 2004 diesel engines are Fiat-sourced common rail units. The Vector form was replaced with the Aero in
7-limit tuning Young's "The Well-Tuned Piano", Ben Johnston's String Quartet No. 4, and Lou Harrison's "Incidental Music for Corneille's Cinna". The Great Highland Bagpipe is tuned to a ten-note seven-limit scale: 1:1, 9:8, 5:4, 4:3, 27:20, 3:2, 5:3, 7:4, 16:9, 9:5. In the 2nd century Ptolemy described the septimal intervals: 7/4, 8/7, 7/6, 12/7, 7/5, and 10/7. Those considering 7 to be consonant include Marin Mersenne, Giuseppe Tartini, Leonhard Euler, François-Joseph Fétis, J. A. Serre, Moritz Hauptmann, Alexander John Ellis, Wilfred Perrett, Max Friedrich Meyer. Those considering 7 to be dissonant include Gioseffo Zarlino, René Descartes, Jean-Philippe Rameau, Hermann von Helmholtz, A.