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In Javanese gamelan, the tones of slendro are numbered 1 2 3 5 6.

Traditionally, there are three pathet or modes of pelog. Pelog nem (or pathet nem) uses the tones 1 2 3 5 6 with an emphasis on either 6-2 or 5-1 depending on the piece (technically, depending whether the piece is emulating slendro manyuro or slendro songo).

Pelog barang uses 2 3 5 6 7, usually emphasizing 6+2 or 3+7. Pelog lima is a sort of "odds and ends" for uses of the 1 2 3 5 6 scale that don't really fit into anywhere else. The 4 tone is not often encountered, and some elaborating instruments lack the tone entirely.

Regional variations within gamelan have emerged, with each tradition showcasing unique colors, playing techniques, and stylistic nuances. The Javanese, Balinese, Sundanese, and Central Javanese gamelan traditions are noteworthy examples, highlighting the cultural diversity and local artistic expressions within the gamelan tradition.

In addition, more Westerners started to learn and practice Gamelan Jawa in their respective country.

One of the example of the incorporation of gamelan in contemporary music is from Indonesian EDM (Electronic Dance Music) group called “Weird Genius” who features Gamelan Jawa elements in their song "Lathi". The song combines modern EDM beats and production techniques with traditional Javanese Gamelan. Another example is from Radiohead's song "Bodysnatchers," released in 2007 as part of their album "In Rainbows," the band incorporates gamelan elements to create a distinct sonic texture. 

Notably, the integration of Gamelan Jawa elements into the EDM framework of "Lathi" is executed seamlessly. The distinct sonic qualities of the slenthem are intricately blended with electronic synthesizers and basslines, resulting in a harmonious fusion of traditional and contemporary sounds. The repetitive and interlocking patterns inherent in Gamelan Jawa seamlessly converge with the EDM beats, heightening the overall rhythmic and captivating energy of the song. 

The innovative juxtaposition of traditional Gamelan elements with contemporary electronic elements has gained recognition for its captivating approach, consequently bring the exposure of Gamelan Jawa to a wider international audience. 

"Bodysnatchers" is praised by many as Radiohead's use of Gamelan elements in their music is considered unique. The gendèr's inclusion adds a layer of texture and complexity to the music, enhancing its atmospheric and hypnotic qualities. It demonstrates the band's willingness to explore new musical territories and experiment with unconventional instruments within their alternative rock framework. 

The Gamelan instrument in "Bodysnatchers" serves as a sound enrichment, contributing to the song's overall atmosphere rather than being the central focus. It showcases Radiohead's adeptness at incorporating diverse musical influences to create unique and engaging compositions. Their integration of the Gamelan instrument showcases their artistic vision and willingness to push boundaries, resulting in a captivating and distinctive musical experience. 

Traditional Javanese Gamelan emphasizes collective ensemble playing, with musicians seated cross-legged, attentively listening to one another. Their sounds seamlessly blend, creating a harmonious whole. The instruments themselves are meticulously crafted, showcasing intricate carvings and designs, reflecting the meticulous craftsmanship valued in Javanese culture.

In contrasting, the modern context witnesses Javanese Gamelan's creative expansion and reinterpretation. Composers and musicians embrace gamelan as a wellspring of inspiration, fusing it with contemporary genres and styles. This fusion yields innovative compositions and collaborations that push the boundaries of traditional gamelan music.

Despite the evolution in the modern context, the essence of Javanese Gamelan remains intact. It serves as a vessel for cultural expression, storytelling, and community engagement. The communal aspect of gamelan, where musicians interact and communicate through their instruments, still holds true, fostering unity and shared experiences.

In essence, it is safe to say that Javanese Gamelan is a timeless musical instruments as it has been around for decades and still being preserved up to today. Gamelan gracefully bridges the traditional and modern realms, adapting to new horizons while preserving its beautiful melodies, intricate rhythms, and cultural significance. Whether in its traditional or modern guise, Javanese Gamelan captivates with its enchanting allure, celebrating its roots while embracing the future.