National Library of Australia Musical Collections

The Library holds the largest research collection of music in Australia. Its strengths are in retrospective and contemporary Australiana, including printed music, published and unpublished scores, and archival sound recordings of folk song and dance traditions in Australia. The collection consists of music and music-related materials that form part of the documentary record of Australian culture, including:

music (published and unpublished scores, and archival sound recordings)
resources about music and musical life (books, journals, electronic resources, programmes, images, oral histories, pictorial collections and papers of individual musicians and music organisations)

The term 'Australian music' is defined as music created by Australians, published in Australia or associated with Australia by explicit Australian performance or subject reference.

Printed Music
Archival Sound Recordings and Oral Histories
Indigenous Music
Digital Music
Overseas Music
Resources about Music and Musical Life

and that page goes on for ages about the different types of music held, eg,

Printed Music
All types and styles of Australian printed music are collected: for example,

popular
classical
folk
church
dance
educational
film
children's
multicultrual
indigenous
jazz
band
instrumental
vocal and choral
theoretical and didactic
electronic.