Articles
Traditional music of the Philippines
A small introduction written by Ingo Stoevesandt, which is also posted here

"The boatlutes of the Philippines" written by Hans Brandeis
70 page PDF written by ethno-musicologist  Hans Brandeis

"Boatlutes in the Visayas" written by Hans Brandeis
106 page PDF written by ethno-musicologist  Hans Brandeis

"Kudyapi" written by Hans Brandeis
An article written by ethno-musicologist  Hans Brandeis

http://user.cs.tu-berlin.de/~brandeis/
The homepage and articles of ethno-musicologist  Hans Brandeis

"Tradition and Innovation: Bamboo music in the Philippines"
A wonderful book (PDF) about Bamboo instruments in the Philippines

http://www.intangible.org/Features/kalinga/index.html
A beautiful online version of the film “Sounds of the Kalinga” by David G. Such with detailed informations, audio and video files

http://www.tigerbells.nl/
An interesting article about the “tiger bell” by Fekke de Jager

http://www.angelfire.com/music2/grau/index.htm
A huge online article titled “Diatonic harp of the Philippines” written by Stephen L. Grauberger

http://www.univie.ac.at/Voelkerkunde/apsis/aufi/music/kgapi.htm
An article with pictures and audio files about the Kontemporaryong Gamelan Pilippino ensemble

http://www.ncca.gov.ph/
The homepage of the National Comission for Culture and Arts (NCAA)

http://sulawesistudies.blogspot.de/2005/09/comparison-of-music-of-philippines-and.html
a comparison between Sulawesi and Philippines musical traditions by  Mohammed Amin