English summary: This book is meant to serve as a field guide for ethnomusicologists, regardless of their specific area of study, offering both practical and theoretical advice on collecting data, relations with musicians, and techniques for data analysis. French description: Cet ouvrage propose un guide destine a aider les ethnomusicologues - etudiants ou professionnels - a preparer et a conduire leurs recherches. Il contient l'essentiel des recommandations...