I have had this album on vinyl for many years and was delighted to discover it in CD format. Almost unique and real breakthrough music at the time, these recordings dating back to the early 60's in many cases,have stood the test of time. However, for anyone considering buying this album, don't expect lengthy tunes. Instead it is made up of 33 short snippets of electronic music, in some cases only a few seconds long. The sound quality is superb, as is to be expected with BBC recordings, and for listeners of a certain age (like this reviewer)it is amazing how many of the tunes sound familiar. This is an album to delve into rather than sit down and listen to in its entirety but well worth having.