I’ve been listening to this box set put out by Basta called, “Popular Electronics: Early Dutch Electronic Music from Philips Research Laboratories 1956-1963.” It includes the complete electronic work of Kid Baltan and Tom Dissevelt. Electronic music created for ballet by Henk Badings, film scores by Dick Raaijmakers, and a disc of alternate takes and stems from Baltan’s work.
I ordered it from them directly as I couldn’t find a copy anywhere else and I’m glad I did. The packaging is great – there are a couple of printed scores, a small timeline poster, and extensive track notes to read while you listen. The album is available as a download from Amazon but the packaging is so wonderful I recommend tracking down a physical copy. After the break are some tracks from the album that Basta has on their Soundcloud account.