The following sections describe the supported operations. Each operation provides contextual help (viewed by hovering over or clicking the '?' next to the operation's name). Clicking an operation's name reveals any additional options or inputs required for the operation.
Shifting (also known as grahabhEdam or shrutibhEdam) allows the scale of a rAgam to be shifted by one or more note positions, possibly resulting in a new rAgam's scale. Artistes use this technique to smoothly slide from one rAgam to another (or through a series of rAgams).
Typically, the shift operation shows only those rAgams whose note sequence matches the source rAgam in both the ascending and descending scales. However, if the "Unidirection ok" option is enabled, rAgams that match only in one direction are also shown.
Similarly, the "Partial" option allows one to view even those rAgams whose notes match only partially. (For example, only the first five out of the seven notes are reachable through shifting).
Information about the resulting rAgams includes an annotation indicating the "match reason" (whether the rAgam matched in both directions or not, how many notes matched, etc.).
Swapping (sometimes referred to as svarabhEdam), is another technique to transition between rAgams. Here, one note of a rAgam is replaced by another equivalent note, possibly resulting in a new rAgam. The new note will be in the same "note group" as the note being replaced. (A Ri will be swapped only with another Ri, a Ga with another Ga, and so on.)
Sometimes, dropping one or more notes from a rAgam results in a new rAgam or just a scale that doesn't correspond to any known rAgam. This can be further shifted or swapped to arrive at a new rAgam.
This operation shows rAgams whose notes are a subset of the current rAgam's set of notes. The 'Lengths(?)' parameter is used to narrow down the subset.
This operation shows rAgams whose notes are a superset of the current rAgam's set of notes. The 'Lengths(?)' parameter is used to narrow down the superset.
Note: In the case of both subset and superset, the length values are considered as hints only. This is because vakra-rAgams may repeat one or more notes, and also some rAgams have different notes and/or different number of notes in their ascending and descending scales.