I see mood and visual as even more important than the chord changes or the harmonic content.

Different instruments have different harmonic content for the same pitch.

The sound often has heavy harmonic content.

The theme will be analysed for key, harmonic content and rhythm while it is being performed by a human.

The specific set of harmonic-vs-amplitude pairs is known as a sound's harmonic content.

A sound does not necessarily have the same harmonic content throughout the duration of the sound.

The speakers also generate distortion which adds to the harmonic content, or crunch, but not to the clarity of individual notes.

Strategy selection will affect the harmonic content and the switching losses.

Total rejection of the fundamental just leaves the harmonic content that represents the distortion and can be measured readily.

In power systems it is often desired to eliminate harmonic content found in line currents.