[In Siamese (Thai) music,] "the comparatively large share of drums, however, indicates the neighborhood of India" - Curt Sachs

The strange, never-ceasing drones used in the choral singing of Tibet belong in the Indian, not the Chinese sphere of Tibetan civilization.

When we read in Bharata's classical book of the twenty-two microtones in ancient Indian octaves, of innumerable scales and modes, and of seventeen melodic patterns and their pentatonic and hexatonic alterations, we realize that music at, or even before, the beginning of the first century AD was by no means archaic. Indeed, there is no reason to believe that India's ancient music differed substantially from her modern music.

[And here is what Sachs has to say about Bharata's ancient text the Natya-Shastra, which he agrees could be as early as the 4th century BCE and about which he tells us that it] "testifies to a well-established system of music in ancient India, with an elaborate theory of intervals, consonances, modes, melodic and rhythmic patterns". ... "Bharata's text was probably rehandled as early as antiquity, and it may confirm the idea that Bharata himself wrote his treatise much earlier" ... [He also tells us that this text establishes that it represents a stage where the] "slow transition from folk-song to art-song, from hundreds of tribal styles to one all-embracing music of India […] had long ago come to an end".