Saab 9-5 as undercover, in several parts of its native Sweden, alongside the Volvo V70. Several police forces in the UK also used the 9-5 in their fleets, mostly in Aero specification. The city of Aspen, Colorado, used Saabs as patrol cars from early 1970s until 2005, when the 9-5 was discontinued in favor of Volvo XC90. The town of Vail, Colorado likewise used Saabs from 1980 onwards, but in 2005, the black 9-5 patrol cars were replaced by Ford Explorers, due to budget reasons. In 2006, Lothian and Borders Police in Edinburgh, Scotland, began operating three Saab 9-5 Aero 2.3T patrol
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.