Seven mechanisms
Seven cases are singled out on the interactive map because each illuminates a different mechanism by which a scene becomes a genre. They are institutions and mechanisms, not favorite bands. A case is featured only when it rests on at least one official studio, label, artist or festival source, an independent source for any historical or superlative claim, a date, a defined relationship or event, a separation of completed from announced activity, and no reliance on private communications. Node size and centrality are computed from the dataset and are never adjusted for a case.
Morrisound Recording: the room that made the place. One room, two brothers and a producer give a set of Florida teenagers a recurring professional room, and the sound made in it is one the world flies in to buy. The evidence rule is the credit table: a band is linked to the studio only where an album and a year are recorded, and the widely repeated credits that fail the test are placed elsewhere. On the full graph the studio ranks 3 on betweenness, as convergence infrastructure rather than the sole bridge; on the people and production graph it ranks 58, where Scott Burns ranks 1 [MSA] [GEH] [HCM].
Scott Burns: the transmission system. The room created convergence; the producer made its methods portable. From Leprosy in 1988 to 1997 one engineer carries the same drum triggering, gating and separation across Florida bands, label rosters and fly in clients, and once to Rio de Janeiro. The evidence rule is a production credit with an album and a year for every edge, kept separate from the recording credit. He is the highest betweenness node on the people and production graph (0.169) and ranks 19 on the full graph [TAP] [GEH] [WBR].
Cannibal Corpse: inbound relocation. A Buffalo band formed in December 1988 from Tirant Sin, Beyond Death and Leviathan is signed by Metal Blade in July 1989, sent to Morrisound for Eaten Back to Life in May 1990, and comes back for Butchered at Birth, Tomb of the Mutilated and The Bleeding before moving to Tampa in 1994 to be inside the scene it had been commuting to. Malevolent Creation made the same journey from Buffalo to Fort Lauderdale six years earlier. The evidence rule is a dated relocation from the band's own label and a studio credit for every album before it [MBC] [LWC] [WEB] [WGS].
Death: the personnel engine. A sequence of working groups whose members move into Massacre, Autopsy, Cynic, Testament, Control Denied, Iced Earth, Death to All, Gruesome and Left to Die. The evidence rule is a member edge with years for every musician, taken from album credits and the band's own history; Death is the highest betweenness node on the full graph in this version of the dataset (0.178) because those moves bridge otherwise separate clusters [WHU] [BHU] [WDT].
Sepultura: the fly in client. Scott Burns flies to Rio de Janeiro for Beneath the Remains in December 1988, then the band flies to Tampa for Arise in 1990 and 1991 and carries the sound home, where it goes platinum. Pestilence, Napalm Death, Cancer, Gorguts, Suffocation and Loudblast follow the same route in 1990 and 1991. The evidence rule is the album page for each session, with the studio named [WBR] [WAR] [TAP].
Studio Fredman: the place that answered Tampa. Gothenburg did not reproduce Tampa. It built a different studio centered system and a distinct genre, melodic death metal. Fredrik Nordström's room makes Slaughter of the Soul, The Jester Race and The Gallery in 1995 and 1996, and the melodic death metal they define reaches American metalcore through Killswitch Engage, whose guitarist names Carcass and At the Gates. The evidence rule is the studio credit for each album and a direct quotation for the influence claim [WSS] [WJR] [WSF] [MRA].
Gruesome: export by record. The 2010s revival travels through reissues and tribute rather than through people. Relapse licenses the Death catalog in 2010, Death to All tours it from 2012, and Gruesome, formed by two musicians who met on that tour, records an album in the style of each Death era for the label that owns the originals. Left to Die, with Rick Rozz and Terry Butler, re records the Mantas material in 2026 on the same label. The evidence rule is the label's own pages and the band's own statement of intent [WRL] [RGS] [AMG] [BLT].
What Tampa shows. Before Tampa's death metal history received a marker, exhibitions and civic recognition, it was a network of local teenagers, inexpensive rehearsal and club spaces, a studio, engineers, record stores, fanzines, labels and touring bands. The value was real before it was respectable. The lesson is not that a city can manufacture a genre. It is that places should learn to recognize the systems already forming around their rooms, people and standards.