"Ur-Techno" (1958)
by Harald Genzmer for Trautonium & Tapemachines

Out of necessity, Harald Genzmer and Oskar Sala "invented" the basic technology of every DJ today.

The work was to be composed for 3 Trautonium, but there was only one player. So Sala made do with multi-track tapes - the "Ur- techno" was invented.