From Tin Pan Alley to Algorithms argues that AI-generated music is not a cultural rupture, a moral collapse, or the end of musicianship—but the latest phase in a long history of manufactured sound. Long before machines could generate melodies, music was already shaped by systems: publishing houses, recording studios, producers, editors, playlists, and platforms that quietly determined how songs were made, heard, and valued. This book traces that history from the song factories of Tin Pan Alley through mechanical reproduction, studio production, electronic instruments, digital editing, and streaming infrastructure, showing how creative authority has repeatedly shifted away from embodied performance and toward systems of specification, selection, and control. Each transformation provoked fear, resistance, and claims of inauthenticity. Each ultimately became normal. Rather than debating whether AI music is “real” art, From Tin Pan Alley to Algorithms asks a more precise question: why does generated music feel threatening when so many earlier forms of mediation were accepted without protest? Drawing on historical examples—from player pianos and demos to deluxe editions and archival mining—the book shows that modern music has long treated songs as usable material rather than finished objects. AI generation does not break that logic. It makes it visible. This is not a how-to guide, a manifesto, or a defense of technology for its own sake. It is an argument grounded in history, industry practice, and economic reality. It explains why concerns about authorship, labor, and authenticity keep resurfacing—and why they always attach to systems, not sounds. Written for musicians, writers, technologists, critics, and serious listeners, From Tin Pan Alley to Algorithms reframes the debate around AI music by replacing panic with context. The future of music, it argues, will not be decided by machines alone—but by which kinds of human effort our systems choose to reward.