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Speedy J (born Jochem George Paap in 1969, Rotterdam), is a Dutch electronic music producer based in the city of Rotterdam. His breakthrough came with the release in 1992 of the minimal techno track Pullover. Subsequently his material became more mellow as he moved away from the hardcore sounds that were then becoming popular in Belgium and the Netherlands.
His debut album Ginger (1993) was released on Richie Hawtin's Plus 8 record label in Canada, while in the UK it was part of Warp Records' Artificial Intelligence series of electronic listening music. A further, more introspective release, G-Spot followed in 1995; a live album, !ive, was also released. Afterwards his work, which included Public Energy No.1 (1997) and A Shocking Hobby (2000) became more experimental, importantly influencing the development of what is known as "IDM", or intelligent dance music.
"Upon first impressions, Public Energy No.1 highlights a big departure from previous Speedy J offerings... in a complete role reversal, it enters upon an iconoclastic electro territory more familiar to admirers of such other purveyors as Autechre, the Aphex Twin, Mike Paradinas and Martin Damm in his Steel persona," wrote Andrez Bergen in 1998 for Australian magazine Inpress. 
The album Loudboxer (2002) saw a return to a more minimal four to the floor style of techno. While the CD version of the album contains 15 tracks mixed together, the vinyl version instead contains 200 locked grooves.
He collaborated with Mike Paradinas on the project Slag Boom Van Loon, through which they have released two CDs on Paradinas's record label, Planet Mu. In 1999, he also released two ambient albums for the FAX +49-69/450464 label under his real name.
In 2008, he released his sound library/audio software, entitled Kreate by Jochem Paap. KREATE is released by Fixed Noise.
Also in 2008, Speedy J started releasing music on his own record label, Electric Deluxe, as well as records by Terence Fixmer, Gary Beck, Tommy Four Seven and others.
In 2013, Speedy J and Luca Mortellaro released a collaborative album under the name Zeitgeber. It was released on Mortellaro's label Stroboscopic Artefacts.
- Ginger (Plus 8/Warp, 1993)
- G-Spot (Plus 8/Warp, 1995)
- !ive (Beam Me Up!, 1995) (live album)
- Public Energy No. 1 (Plus 8/NovaMute, 1997)
- Vrs-Mbnt-Pcs 9598 I (Fax +49-69/450464, 1999) (as Jochem Paap)
- Vrs-Mbnt-Pcs 9598 II (Fax +49-69/450464, 1999) (as Jochem Paap)
- A Shocking Hobby (NovaMute, 2000)
- Loudboxer (NovaMute, 2002)
Collaborations as Jochem Paap
- Slag Boom Van Loon – Slag Boom Van Loon (Planet Mu, 1998) (with Mike Paradinas)
- Slag Boom Van Loon – So Soon (Planet Mu, 2001) (other artists' remixes of the Slag Boom Van Loon album)
- Pete Namlook & Jochem Paap – pp.nmlk (Fax +49-69/450464, 2004)
- Jochem Paap + Scott Pagano – Umfeld (Umfeld.tv, 2007) (released as a DVD, audio by Jochem Paap, video by Scott Pagano)
- Zeitgeber – Zeitgeber (Stroboscopic Artefacts, 2013) (Speedy J and Luca Mortellaro collaborative album)
Collabs is the name of a series of 12" vinyl EPs wherein Speedy J collaborates with a selection of techno artists. Following Collabs 300 Speedy J and Chris Liebing embarked on a Collabs tour, on which they performed a mix of live samples and turntable mixing. An album, Collabs 3000: Metalism, was released November 10, 2005, on NovaMute.
- Collabs 100 (with Adam Beyer)
- Collabs 200 (with Literon)
- Collabs 300 (with Chris Liebing)
- Collabs 301 (with Chris Liebing)
- Collabs 3000: Metalism (with Chris Liebing)
- Collabs 400 (with George Issakidis)
- Collabs 401 (with George Issakidis)
- Speed Freak, Andrez Bergen. Zebra, Inpress, 1998.