Part 960 was not about perfection. Its missteps were architecture: a missed beat that became a breath, a mistranscribed lyric ceded to the audience to resolve. Someone clapped out of time and it turned into a new rhythm. A line about “the tongue of the city” stumbled into “the tongue of the river,” and an impromptu harmonica answered from the dim. These were not errors but invitations. The cassette—if you could call the intangible thing that gathered in that alley a cassette—collected such invitations and bound them with tape and patience.