As preparation for the interview, I spent a lot of time over the last couple of weeks revisiting Spiegel’s records, most notably The Expanding Universe, her 1980 masterpiece that blends synth experimentalism with early examples of what would eventually be called ambient music, and algorithmic composition techniques. Tracks like these and “Music for Dance II” wouldn’t feel out of place on modern ambient Instagram or modular synth YouTube, scenes that obviously owe a lot to Spiegel’s pioneering works. While The Expanding Universe doesn’t necessarily present a cohesive vision, it still feels like the singular expression of an artist at the height of their game. The 2012 reissue adds to Spiegel’s legacy by including over 100 minutes of additional material not on the original release. While the idea of 70s experimental synth music might scare off casual listeners, there is something inviting about a lot of the works on The Expanding Universe.