The ITMA collection has grown to its present size as the result of widespread public support from many individuals and many institutions. The materials in the Archive collection, which exist in original or copied forms, are:

Sound recordings: Phonograph cylinders, 78rpm gramophone discs, acetate discs, vinyl recordings (SP, EP, LP), ¼" reel-to-reel tapes, standard and DAT audio cassettes, CDs, as well as digital audio files in various formats

Printed items: Ballad sheets, chapbooks, sheet music, song collections, instrumental music collections, dance collections, music studies, background studies, reference works, periodicals, and ephemera such as programmes, catalogues, postcards, leaflets, flyers, posters, and newspaper clippings

Manuscripts Music manuscripts, card indexes, research notes, letters, lecture scripts, typescript theses

Visual items: Drawings, prints, photographs, negatives, slides, microfilms, video cassettes, DVDs, digital video files in various formats

Artefacts: Musical instruments, statues, badges, coins, trinkets