I already uploaded an excerpt from this 1969 documentary showing Tangerine Dream recording in the so called „Electronic Beat Studio“. The Beat-Studio was located in the basement of a West Berlin school, funded by the city government to give young West-Berlin musicians an opportunity to learn modern recording technics.It's first head was Swiss composer Thomas Kessler. Agitation Free, Ashra Temple, Tangerine Dream and many more recorded here. I was asked to make the whole documentary available. So here it is…