This video shows a beautiful
example of using P and L transformations on the
Tonnetz to analyze a passage
from Brahms, Concerto for Violin and Cello, Op. 102, 1st mvt, mm.
270-76. The example is taken from the work of Richard Cohn, specifically pp.
30-31 of Audacious Euphony: Chromaticism and the Triad's Second Nature,
Oxford University Press, 2012. On the right of the
video is a graph of the moves on the Tonnetz that are shown (by a
different method) in the video. The triad A-flat major that begins the sequence
is circled in the graph.