An
interview with Tom Moutlton, who came up with disco mixes (though, maybe others did, too?):
Then I went to a couple of discotheques, and I noticed how people were really starting to get into music, in a different way than I had ever realised; and I noticed how, towards the end of a record, people would really start to get into it and then, for some strange reason, they’d lose it, because another record would come on, or two records would be playing at the same time. So I figured, God, if people get off that much on music, there’s got to be a way to take them from where that peak is at the end of a record, and hold them, and take them up another level.
I started fooling around technically with tapes at home, and I finally got one place to try one of my tapes. I noticed that by doing edits, and by using parts of the actual record over again, like the instrumental break, people would yell and there’d be an emotional reaction. I just wanted to make people get off on the music, or at least extend that feeling that they had at the end of a record. Say I do a forty-five minute set; you start your records off at one level, and try to build up to a peak. When I do a mix, I try to take that whole forty-five minute trip and put it into one record. You start here, and then by the time the record is over you have them up at the ceiling.
He has a quantitative update on the state of computers at the tune:
The use of computer mixes still isn’t perfected yet; the computer can perform two hundred and twenty functions, and we’re only using about three percent of its total capabilities.
He also talks about changing the speed of recordings, and I thought, how did they avoid changing pitch with analogue equipment? They didn’t. Pretty bold.
Also, disco is a bassy music, but he liked to roll the bass off of the bass guitar and gave that space to the kick drum. I guess punchiness is more important than bassiness in disco.