Iraya language, spoken by Mangyans in the province of Mindoro in the Philippines.
He enrolled in the University of the Philippines' College of Music in 1977 as a student of Ramon P. Santos, and encountered the musical compositions of Jose Maceda, attended several seminar-workshops of visiting lecturers, and did research on the music of the Iraya-Mangyan people of Mindoro, which became the inspiration for his compositions.
In 2002, Maximum RockNRoll featured Martin Sorrondeguy in its "QueerPunk" issue, in discussion with Gary Fembot and Iraya Robles of Sta-Prest, and Aaron Detroit of The Little Deaths.