Sebastian Ahrenberg, known professionally as Seba (also as Forme), is a Swedish producer and DJ working across breakbeat, drum and bass, jungle and liquid-funk. He is based in Stockholm and has released music and run events and a label from there since the mid‑1990s.

His first professional release was "Sonic Winds" — a co-production with Lo‑tek — issued on LTJ Bukem's Looking Good Records in 1996. In 1997 he founded the Secret Operations club in central Stockholm and later ran the Secret Operations record label. Between 1999 and 2003 Ahrenberg released mostly house material on the Swedish Svek label under the names Seba and Forme; he returned to drum and bass in 2002 via releases on Secret Operations and on other labels.

As a producer Seba’s sound is specific and repeatable: meticulous break editing, tight drum programming and a focus on warm, layered low end. His tracks commonly pair cleanly processed breaks with round mid/sub bass layers and lush, reverb‑soaked pads or stringlike atmospheres. He frequently places clear vocal hooks — most notably his long-running collaborations with vocalist Robert Manos — over spacious arrangements, which gives many tracks a liquid, melodic character while retaining crisp percussion detail. Seba’s productions emphasize clarity in the mixdown: separated kick and sub, restrained midrange, and sustained ambient elements that sit behind rather than on top of the drums.

As a DJ he leans toward smooth blends and harmonic sequencing, favoring rollers and liquid cuts that showcase his own productions alongside complementary releases. His sets commonly prioritize dynamic control of the low end and a sequencing that moves from atmospheric, vocal‑led tracks into deeper, drum‑driven rollers rather than abrupt peak‑time jumps.

Career highlights and specific releases: "Sonic Winds" (with Lo‑tek) on Looking Good Records (1996); founding Secret Operations club (1997) and later operating the Secret Operations label; a period of house releases on Svek between 1999–2003 under both Seba and Forme; and a sustained return to drum and bass from 2002 onward. Album releases include Producer 6 (2003), Beats Me (with Paradox, 2006), Return to Forever (2008), Identity (2013), Ingaro (2022) and Oni (2024). He has collaborated frequently with Paradox and with Robert Manos, the latter appearing as a recurring vocalist across his catalog.

Concrete label and collaborator connections that mark his career: a first release on LTJ Bukem’s Looking Good Records (1996); multiple house releases on Sweden’s Svek label (1999–2003) as Seba and Forme; and the operation of his own Secret Operations imprint from 2002 onward. Collaborations with Paradox produced co‑released material and a joint album (Beats Me, 2006), while Robert Manos supplied vocals on numerous tracks across Seba’s drum and bass output.

Seba’s recorded output and label activity span nearly three decades: from "Sonic Winds" in 1996, through house and Forme material around the turn of the century, back into drum and bass from 2002, and album releases continuing into 2024 with Oni. His discography, repeated collaborations with Paradox and Robert Manos, and stewardship of Secret Operations are the concrete markers of his role in the scene.

Releases & EPs

Brotherhood / Stockholm Syndrome

Gunpowder / The Way Things Are

Inner Revolution / Borrowed Love

Traveller / Connexion (The Sect Remix)