There was a snippet of the interview in the Paroles Et Musique (2009) documentary. I will post the subtitles of that fragment:
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-We've just listened
to the music..
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..of J-M Jarre. What instrument
did you use to write this music ?
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-Basically, I've used
2 synthesizers, which are...
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...electronic music instruments,
some sort of organs, well, a bit
more complicated.
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I think that what is very important
is to manage to put order...
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...into this kind of sound so that it
is more striking to the
sensibility of people
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..that their spirit, in the end.
That's what I think.