FRANCE. Provence-Alpes-Côtes d'Azur region. Var departement. Ollioules. Châteauvallon Festival. On the stage of the big amphitheater. In the foreground, US jazz musician Charles MINGUS (double bass) here playing the piano. In the background, his son Eugene MINGUS (congas). Soundcheck for the evening concert. CHARLES MINGUS QUINTET. Tuesday, August 22nd 1972.