Tonality (noun)

1. The system of using different musical keys, especially major and minor, as the basis for a composition or piece of music.
2. The emotional quality or mood conveyed by a piece of music.
3. The way in which a particular sound or note is produced, especially with reference to its pitch or the inflection of the speaker's voice.

Origin:

Mid 19th century, from tonal + -ity.

Examples:

1. The tonality of the piece changed from major to minor, conveying a sense of sadness.
2. The song's tonality was upbeat and cheerful.
3. The tonality of his voice was deep and serious.
4. The composer experimented with different tonalities in his works.
5. The tonality of the piece was described as cheerful and celebratory.