The Music of Hindostan c10.74

c10.74

In modern music *Pa* is the ‘imperishable’ note, i. e. it is never sharpened or flattened as are the other notes, with the exception of *Sa*. So that we see here perhaps the transition from the heptachord consisting of two conjunct tetrachords meeting at the *madhyama*, to an octachord based on the Fifth-relationship of *Sa* and *Pa* (the new *madhyama*) with the movable *aṃśa* doing the work of the old fixed *madhyama*. In other words we have the transition from the *Harmoniā* to the *Tonos*.