Michael Williams started his professional career at the BBC Television Studios in London in 1960. In 1965 he moved to France to work for ''Societe Audax'' in Paris developing loudspeakers for professional sound and television broadcasting, and later worked for the ''Conservatoire National des Arts et Metiers'' as Chief Engineer in the adult education television service. In 1980 he became a free-lance instructor in Audio Engineering and Sound Recording Practice, working for most of the major French national television and sound broadcasting companies, as well as many training schools and institutions. He is an active member of the Audio Engineering Society, and has published many papers on Stereo and Multichannel Recording Systems over the past twenty years. He is at present the AES Publications Sales Representative in Europe.