oh btw. some of those tracks i believe appeared on More and Obscured by Clouds, two virtually unknown pink floyd albums released between 69 and 72. Ummagumma, Atom Heart Mother, and Meddle were inbetween. So was Relics. There wewre probaly rehearsing for a concert from the sound of it Great find! the second song is "green is the colour" which is on the More album.. then it went silent...