Prefuse 73 (Guillermo Scott Herren), is a hip-hop and electronic producer/artist, currently based out of Barcelona and signed to Warp Records. Herren releases music under various aliases, most notably Prefuse 73, Delarosa and Asora and Piano Overlord and Ahmad Szabo. He also performs with Eva Puyuelo Muns as the group Savath and Savalas. He began his career DJing at MJQ, a small night club in Atlanta, and then began working in commercial studios but soon branched out into his own music. Herren's first major release was under the Delarosa and Asora moniker in 1997 with Sleep Method Suite, with his latest work currently being the Prefuse 73 full-length album, Preparations[which included a bonus disc of purely orchestral ambience dubbed "Interregnums." This disc being Herren's first time ever composing for a full orchestra.] In 2000, Herren released a CD/LP on Hefty Records / Warp Records titled Folk Songs For Trains, Trees, And Honey. This followed by a 2001 exclusive limited pressing (700 copies) of Immediate Action #1 LP on Hefty. Herren first released music under the Prefuse 73 moniker with 2001's commercially and critically successful Vocal Studies & Uprock Narratives. In 2002 the 4-track EP The 92 Vs. 02 Collection was released, but this merely bridged the
| 1 | Hideyaface Feat Ghostface+El-P | Surrounded By Silence |
| 2 | Southerners (Interlude) | One Word Extinguisher |
| 3 | Choking You | One Word Extinguisher |
| 4 | Kev Intro 99 | Extinguished: Outtakes |
| 5 | Track 2 | CDR |
| 6 | One For The Crime Scene, A Bul | Extinguished: Outtakes |
| 7 | Invigorate (A Prefuse/Daybre Production) | One Word Extinguisher |
| 8 | Martinique | Extinguished: Outtakes |
| 9 | Tel Aviv's Gravel Toothbrush | Extinguished: Outtakes |
| 10 | Dubs That Don't Match | Extinguished: Outtakes |
| 11 | Suite For the Ways Things Chan | Extinguished: Outtakes |
| 12 | Track 5 | CDR |
| 13 | Track 8 | CDR |
| 14 | Untitled | One Word Extinguisher |
| 15 | Busy Signal (Make You Go Bombing Mix) | One Word Extinguisher |
| 16 | Robot Snares Got No Cadence or | Extinguished: Outtakes |
| 17 | 7th message | vocal studies & uprock narrati |
| 18 | Trains On Top Of The Game (Interlude) | One Word Extinguisher |
| 19 | Track 10 | CDR |
| 20 | If They Died and They Were You | Extinguished: Outtakes |