Triads and Harmonic Analysis
Sonority refers to harmonic simultaneity of pitches. An interval is the most basic sonority.
Example 7.04 is an updated version of the chart first presented in Triads and Harmonic Analysis in example 5.07. It now includes analysis of diatonic seventh chords for major keys.

The Well-tempered Clavier, Prelude I, BWV 846: J.S. Bach, 1722. Public Domain.
To help with analysis, the chords in example 7.15 are shown in simple position reduction in example 7.16 below. Example 7.17 that follows shows the excerpt with a textural reduction. Textural reduction is similar to simple position reduction except that it retains all octave designations of all notes present instead of reducing them by pitch class.
detail in Melody and Texture.
Example 7.18 is another excerpt from the Mozart piano sonata used in Note Duration and Meter, Triads and Harmonic Analysis, and earlier in this section. Harmonic analysis is provided.
At other times, composers may use figured bass to indicate notes that are not part of the harmony. Although these nonharmonic tones will be studied in detail in the next section, it is worthwhile to have a present awareness of them in figured bass.
demonstrated in example 7.38. The inner voices (alto and tenor) appear without stems to indicate that they are the realization of the figured bass.

the next section.
Audio/video of various assignments:

Assignment 7.05
Assignment 7.06
Assignments 7.07 & 7.09
Assignment 7.08a
Assignment 7.08b
Assignment 7.10
Assignment 7.11
Assignment 7.12
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Assignment 7.13