ABSTRACT
Yatis Prastara is a technique whereby two different yati phrases intermingle. Each pala of one yati phrase alternates with another pala of a different yati phrase. The sequence can eventually commence off tala sam, but it ought to resolve on tala sam. A simple short cut would be to calculate two different yati phrases of the same length and proceed to mix the palas. However, this is never done in karnatic music. Whenever a yatis prastara containing a samayati has previously been played and is repeated elsewhere in a piece, the number of matras of the samayati can be used as a frame over which different gatis can be superimposed. The combination of yatis is samayati with gopuchayati. In the first krama, the gopuchayati increases by adding notes in the middle. As a viloma, it actually functions as a srotovahayati. The phrase is different to the krama phrase and omits notes from the middle as well.
