Strophic: Song form in which a single melody is repeated with a different set of lyrics for each stanza.
Blue Notes: A note, sounded or suggested, that falls between two adjacent notes in the standard Western division of octave, most often the third or seventh degrees in a scale.
Grace Note: A short ornamental note performed as an embellishment before the principal pitch.
Melisma: A single syllable sung over several pitches
Polyrhythm: Several contrasting rhythms played or sung simultaneously.
Gospel Quartet: Male or Female ensemble of four to six voices singing close vocal harmonies, featuring melismatic lead singers and instrumental accompaniment of drums, guitar, and bass.