Live improvisations recorded Feb. 15-21, 1971 by Pierre Henry from Roger Lafosse's Corticalart device, allowing to transcribe the electric cortex waves in electronic signals for further raw manipulations. Technical realization by Groupe Artec (Bordeaux) with electroacoustic equipment from Apsome & J. Heuze. Silver foil cover front and back. Green labels. Vinyl is NM Cover has a hole punch, otherwise very clean
