Introduction
This introduction delineates the three main pillars of the book. Red music is defined within the context of the Vietnamese music industry and compared with propaganda music in other communist countries. The concept of a continuous revolution is described through reference to literature from political thinkers in Vietnam and the wider communist world. Radio and the voice are assessed as key themes in recent anthropological studies. This is followed by a review of the social history of sound reproduction, which is considered in the fields of ethnomusicology, sound studies, radio studies, and related fields. After outlining the research methodology (ethnographic and archival approaches) and structure of the book, the introduction concludes with notes on language, recordings, and musical transcriptions.