This book explores the relationships between popular music, technology, and the changing media ecosystem. More precisely, it looks at infrastructures and practices of music making and consuming primarily in the post-Napster era of digitization - with some chapters looking back on the technological precursors to digital culture - marked by the emergence of digital tools and platforms such as YouTube or Spotify. The first section provides a critical overview of theories addressing popular music and digital technology, while the second section offers an analysis of the relationship between musical cultures, taste, constructions of authenticity, and technology. The third section offers case studies on the materialities of music consumption from outside the western core of popular music production. The final section reflects on music scenes and the uses and discourses of social media.