He is the former guitarist of the melodic death metal band Dimension Zero,[1] the former bassist of Dark Tranquillity, playing on the 2010 album We Are the Void, and the former guitarist of Soilwork, appearing on the 2007 Sworn to a Great Divide.

In March 2014, a heavy metal band considered a supergroup with mostly Swedish members named Akani, was announced and formed by Antonsson himself on co-guitar, Jorge Rosado (Merauder, ex-Ill Niño) on vocals, Anders Björler (At the Gates, ex-The Haunted) on co-guitar, Victor Brandt (Dominion, ex-Aeon, ex-Entombed, ex-Satyricon) on bass guitar, and Anders Lowgren (Dead Reprise) on drums.

from their upcoming four-song seven-inch single called "Santa Muerte", where the album art was released as well.

Santa Muerte was released in March 2014 through Demons Run Amok Records and the release was produced, recorded and mixed by the band themselves and with Martin Jacobsson at Rovljud Studios in Örebro.

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