TradeMark Gunderson kindly ripped an out-of-print LP from 1973 by the BBC Radiophonic Workshop, called Fourth Dimension. It's awesome.
If you know only one thing of their work, it would be the theme to Doctor Who, the venerable BBC sci-fi television series. They also did the sound effects. And incidental music. In fact, they were a BBC department that produced all manners of strange noises and sound effects (and theme songs) for over 200 other BBC shows. In doing so, they paved a superhighway of innovation that led electronic music growth for decades, from studio engineering to electronic composition to sound collage to synthesizer technology.
I came across this album in a dilapidated Leeds (UK) record shop for just a couple euros and have held onto it for dear life — BBC Radiophonic Workshop on vinyl doesn't sell cheap. The standout track for me is easily Vespucci, a funky saunter with a very sampleable cool synth melody. The abstract cover from this 1973 release looks quite a bit like a CD exploding, perhaps another ahead-of-their-time move from these old-timers.