Figure 6. Examples of Temporal Regularities in Mouse Song.

(A) Sequences of syllables in a phrase. Here, “hdu” syllables have been classified as “A” or “B” depending on whether the lower frequency band fell or rose, respectively. SS and “h” (with a brief grace note) are labeled “C”.

(B) Example of a phrase repeated three times without interruption in the original song. The three repeats are shown one above the other, aligned on the start time for the phrase. See Audio S4 for entire sound recording.

(C) Long time scale changes in syllable type. Syllable type is categorized by whether low jumps are present (LJ⁺) or absent (LJ⁻). Shown is the number of syllables without low jumps, out of the most recent 20 syllables. Insets contain sonograms from the indicated portions of the sequence.

(A) and (C) are from the same trial analyzed in Figure 2B; (B) is from a different mouse.