Listening to the snare drum in the quieter bits in this recording (e.g. around 20 sec. in):
This is not sloppy playing, but a deliberate, and fascinating, offset. We all too often forget these kind of nuances - things that happen in-between the beats and that are difficult to capture and analyse.
120years.net provides a wealth of information on developments in electronic music.
"The focus of this project is in exploring the main themes of electronic instrument design and development previous to 1970 (and therefore isn’t intended as an exhaustive list of recent commercial synthesisers or software packages.) As well as creating a free, encyclopaedic, pedagogical resource on the History of Electronic Music"
This is a neat illustration of the problem of identifying music with its notation. Equating music with a sequence of note onsets, because this is how it looks on the page.