Ethnomusicological monographs are often published with transcriptions, photographs, and recordings; the printed texts present the primary information, while the other materials serve a secondary, supporting role. For ethnographic recordings, these functions are reversed: The recordings themselves are the primary concern, and the other materials fill in contextual or technical information.
Some publications occupy the border between these two types, where neither the printed texts nor the other materials can be definitively deemed secondary. The raga guide: A survey of 74 Hindustani ragas, published by Nimbus in 1999, is an example of such a multifunctioning publication. On its four CDs, each rāga is portrayed in a three- to six-minute rendition by a top-ranking performer; this is arguably the primary information, and RILM classified the publication as a sound recording. But the 196-page book in the package is hard to consider merely supportive—it includes analytical and historical notes for each rāga and its performance, including its basic structures shown in both Western and Indian sargam notation; full transcriptions of the ālāp (introductory) sections of each recording; and 40 full-color reproductions of rāgamālā paintings
