 In the state of mind I did Chronologie , it 's quite close to what I did for Oxygène , using a lot of the old synthesizers of the ' 70s , like the Moog synthesizer — which I consider to be the Stradivarius of electronic music — mixed with the digital sound and the beat of the dance scene of the ' 90s . In a sense , Chronologie is a kind of mixture between the sounds of the ' 70s and the sounds of the ' 90s . 
