Throughout Indonesia, there are many musical styles that are called gamelan. They all have a lot in common, but there is still much variety between different styles of gamelan. Balinese Gamelan, the style specific to Bali, is one of these unique forms that has a lot in common with other musical styles in Indonese such as Javanese Gamelan and the Tampelong of Sumatra, but also has many distinctive features.
The first thing that hit me when listening to excerpts of Balinese Gamelan and watching videos of performers was the rhythmic drive that propells the music. Though Tampelong and Javanese Gamelan often have strong and regular beats, to me, they often seemed more rhythmically free and loose. They seemed more focused on the melodic interlockings than the rhythmic drive.
A reason for this could be found in the instrumentation of the different forms of gamelan. Many instruments are the same in both styles. They both can consist of various types of gongs, metallophones, drums and flutes. In Javanese gamelan, stringed instruments are also used, the most common of which is a two-stringed bowed fiddle-like instrument. In Balinese gamelan, cymbals are also a very common instrument. The percussion parts often seem very central in Balinese gamelan, creating an up-beat, very rhythmically driven feeling music. This is especially evident in the performance of a Balinese Gamelan Beleganjur (to see video, click here).
The form of Balinese gamelan is very similar to that of other types of gamelan. Pieces are composed in a cyclical pattern with many different interlocking parts. In certain types of Balinese gamelan, one instrument or musician may play both an on-beat part, and an interlocking part on the off-beat. Often, such as in Gamelan Rindik, a person will be playing a different part on each hand.
There are many different styles of gamelan within Bali. There are many differences in instrumentation, style, and context within these forms. Some of the differences come through physical aspects of the instruments. For example, all of the styles of gamelan have some form of xylophone-like instrument. However, though most of them are made of metal, most typically brass, Gamelan Rindik uses bamboo xylophones to get a sweeter softer sound. Gamelan Selonding, an ancient form of gamelan associated with pre-Hindu practices, uses iron instead of brass in its instruments. One form of gamelan, the Gamelan Beleganjur is portable and typically used in processions. This is similar to the two distinct styles of tampelong, one that is processional and another that is sedentary. Other types of Balinese Gamelan include Gamelan Angklung and Gamelan Luang.
There are many different contexts for gamelan to be performed in Indonesia. Different forms of gamelan are often used in religious ceremonies, for public festivals, private parties, weddings, funerals, etc. Some are used as an accompaniment to dance or drama while they still often perform alone. With the many different styles of gamelan, there are many similarities and differences between them.