Krakatau

http://www.krakatau.net

"Dwiki Dharmawan uses specially tuned keyboards and sampler into
particular tuning based on Gamelan pentatonic scale called S'lendro.
Different than equal tempered standard tuning, Krakatau music utilizes
10 tones division in an octave with 1 additional note for Balinese
style or certain purposes."

Any idea what actual scale they might be using?

/Ö