Udan Mas (sometimes writtenHudan Mas, the name means "Golden Rain") is a composition forgamelan which is popular in Central Java, especiallyYogyakarta. It is abubaran, which is an ending piece played while the audience departs. In Western concert performances, it is often played as anencore. It is often one of the pieces students learn early in their studies.

The piece can be played in a wide variety ofpathet, includingpélog pathet barang and nem, andsléndro pathet sanga and nem. It can also be played as either alancaran or aladrang, with relatedbalungan.

The recording of the piece onJavanese Court Gamelan, possibly the most famous, is in pélog pathet barang and has a lancaran structure.

Mantle Hood offers an analysis of the ladrang inThe Nuclear Theme as a Determinant of Patet in Javanese Music. He adduces it in his theory of the importance ofcadence contours in its variation in different pathet.

Hujan Mas, which also means "Golden Rain" in modernIndonesian is a well known 20th century composition for Balinese Gamelan in thekebyar style.

• Brown, Robert E. Notes toJava: Court Gamelan. Reissued edition. New York: Nonesuch 79719–2, 2003.
• Hood, Mantle.The Nuclear Theme as a Determinant of Patet in Javanese Music. New York: Da Capo, 1977. Pages 185-187 and 243–244.

• Transcription ofbalungan andbonang parts
• Recordings ofPura Pakualaman gamelan andUniversity of Wisconsin–Madison gamelan

• Compositions for gamelan

• Articles with short description
• Short description matches Wikidata