In their book `` Analog Days '' , Trevor Pinch and Frank Trocco point to the track `` Spaced , '' from the 1970 Beaver & Krause album `` In a Wild Sanctuary '' as the source for Deep Note .
In their book `` Analog Days '' , Trevor Pinch and Frank Trocco point to the track `` Spaced '' , from the 1970 Beaver & Krause album `` In a Wild Sanctuary '' as the source for Deep Note .