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Theatre Du Taur Concert, 1975 (also known as Akt IV) is an official bootleg live album by the Frenchrock band Magma. It was recorded in Toulouse on 24 September 1975 but it was not released until 1994.
The live version of "Mekanïk Destruktïw Kommandöh" recorded here is very distinct from the studio releases, as it features prominent instrumental contributions and improvisations by Didier Lockwood on violin and Bernard Paganotti on bass.