Video Example 4. Op. 19, nos. 1–6, Maurizio Pollini 1974 recording (CD Deutsche Grammophon 423 249-2 GC, 1988, ℗ 1975 Polydor International GmbH, Hamburg); tempo curves (Sonic Visualiser, logarithmic scaling)

no. 1: 00:00 | no. 2: 01:22 | no. 3: 02:22 | no. 4: 03:29 | no. 5: 04:00 | no. 6: 04:42