| Slendro notes
| Approx. piano notes
Slendro is a five-tone scale that very roughly approaches equal-size intervals. The intervals vary within a given scale and across orchestras, but the underlying tuning concept can be considered as a rough five-tone equal temperament (5ET). because it is basically just five near equally spaced tones to the octave. Therefore it has narrow fourths of about 480 cents, in contrast to the wide fourths of the pelog scale
To help understand the modes in Balinese music, below is the approximate Treble cleft positioning of the modes . You can see the difference between Pelog and Slendro, the Slendro mode has more even intervals.
Instruments -------- Gender Wayang, Angklung 1234 Tiklik, Rindik,
Slendro is the primary scale for all of the oldest rites of importance including shadow play in both Bali and Java..
In common practice, Slendro is a five tone scale consisting of, approximately, whole step and minor third intervals. The basic order of intervals from low to high, where 2 equals an approx. whole step and 3 equals an approx. minor third, is 2 3 2 2 3. This scale is said to be derived from an equidistant ten tone master scale. This ten tone scale is never played as such and only serves as a basis for scale theory. A few different combinations of the ten tones may be derived which sound like Slendro, but each will have a slightly different character which may be best suited for one "modality" (term used loosely) or another.
When building a Gamelan, one of these derivations is chosen as best suited for it's purpose and the maker must commit to that interpretation of the Slendro scale. Every tuner also has their own preferences within those derived scales, adding to the wide variety of interpretations of both Slendro and Pelog from Gamelan to Gamelan. String, vocal, and wind instruments have the ability to transcend this limitation and explore other interpretations of the scale by virtue of their unfixed pitch.