From WikiPilipinas: The Hip 'n Free Philippine Encyclopedia
Balitaw is a song that is usually a topical debate genre performed between a male and female, the original form believed to be derived from pre-Hispanic courtship genres mentioned above.
In the Visayas, Balitaw is both a song and dance using lyrics which are ideally humorous and performed spontaneously to a preconceived theme, similar in ways to calypso singing on Trinidad. Most balitaw now, however, are sung to memorized verse using a standard melody and chord progression.
Musically, the balitaw has evolved over time, incorporating melodic variants; even popular melodies can be substituted for traditional melodies in performance.
Banas, Raymundo C., Pilipino Music and Theater, Quezon City: Manlapaz Publishing, Co., 1975