I feel, it could be interesting for some ore few fans, what ore which has been the Quadro-Action including the Quadrosound Music Production. So I will give an overview. I self have started as fan for 4-channel music in 1973 after listening the discreet method of surround music in a hifi-store. As Quadraphony was settled in the end of the 70's by an incompetence music industry I have formed 1980 the club "Quadro-Aktion" to collect the fans and inform them with papers 4 time in a year with up to 32 pages. I have had also contact to fans in the USA - especially with Larry Clifton and Jay Frank and theire papers. 1983 I have written for a HiFi magazin an report about Quadraphony for the may be coming 4-channel CD. Later in 1985 I have written another report about 4-channel in 3 chapters for an Journal of electronic music. By further writings to HiFi papers, I have interested an wellknown chief sound-engineer in a radio station in Switzerland. He has then produced quadraphonic recordings and could send 5 or 6 quadraphonic broadcastings with 2 sperate broadcasting stations. Unfortunately it was only classic music with usual less interess by the listeners. In 1985 we have had with our club self a quadraphonic broadcasting with interview and SQ/QS music by an big radio station. The first time, that was spoken in radio stations about Quadraphony and was broadcasted quadraphonic music, which was before forbidden. From the 80's till 2011 we have demonstrated 7 quadraphonic shows by fairs and some music clubs. In 1988 till 1991 I have started our own music production with 4-channel tape and 4-channel compact casette. By better conditions with the DVD-Audio (I thought) I started with my helpers again further 18 quadraphonic productions from 2011 till 2018. In 2013 I have had a few contact with Lou Dorren. I have helped him with retipping 2 Grado pick ups with Shibata tips in Gemany. He means, I could visite him, but in that time I found no chance to do that. May be, that I could get his protoyps and/or the technical documents to finish his demodulator. In 2014 I have written own text and have also arranged a few other reports from the 70's to a Quadro book with many pictures, which has 887 pages in 2 volumes. It has been by specially conditions only a little edition for an inner circle and is unfortunately now out-of-print.
That is my and our story. In the review of my and our working by writing and producing it was a very interesting time of 39 years quadraphonic activity and so we could give throug the years some fans informations and 4 chanel music with a wide musically taste.
Dietrich