Towards the end of the 1970s, the term maxi single took on a different meaning. Partly due to the rise of discotheques , there was a need for extended versions of (particularly) disco and other dance music . Because a 7-inch single could hold a maximum of about 4 minutes of music per side, these songs were pressed onto 12-inch singles. That is why these maxi singles are also called 12-inch singles. Usually a maxi single contains one to two songs per side. Most maxi singles ran at 45 rpm, but 33 rpm also occurred. This in contrast to a 7-inch single, which almost only ran at 45 rpm. However, 7-inch singles with 33 rpm were also released which originated in the early 1960s, Seeburg jukeboxes had album records pressed so that more songs could be played, the jukebox could be used on the basis of the single hole (large 45 rpm or small 33 rpm ) determine what the speed should be. 6 top hits from England was a series of mini LPs containing 3 songs per side, performed at 33 rpm.