The term “audio-visual source” refers to heterogeneous documents that have been created for a wide range of reasons and for different occasions. Therefore, examining how they are embedded, both with regard to their creation and to the ways in which they are consumed, is of fundamental importance. In the process, the issue of materiality in the media that allow them to be created and reproduced in the first place comes to the fore. In this way, a multi-dimensional web of relationships crystallizes in which music emerges at different levels:

• as the sign-on for a show/program,
• as an original soundtrack (recorded) in audio-visual materials,
• as part of an audio-visual collage,
• as the subject of a conversation/interview with contemporary witnesses.