9 (2009 animated film) declares 2 as dead, but 9, having seen the condemned factory where the Cat-Beast took him, decides to rescue him. 9 and 5 venture to the factory where they find 2. The Cat-Beast attacks the trio, but are saved by the warrior 7 (Jennifer Connelly). 9, drawn by curiosity, connects the talisman to the derelict Fabrication Machine, reviving it, and it subsequently kills 2 by sucking out his soul. 9, 5, and 7 manage to escape the factory. 7 takes 9 and 5 to an abandoned library, where the mute scholar twins, 3 and 4, show 9 a film showing
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.