In this documentary, Brad Mehldau states this about his trio with Jorge Rossy and Larry Grenadier:
It’s pretty specific what I’m doing, I think, especially with the trio. We have the regular pulse that’s going on, and then we have another pulse that would seem to be unrelated to that. And the idea is to make your phrases and your melodies in that other pulse, in that other tempo, but the time is still going by--just as slow or fast--from the first tempo. So you have two different tempos going on at the same time, but your form and your shape is still the same. So I think with the time, it’s always a matter of retaining that form, you know? And that’s sort of what makes it interesting to me, is if you can retain the form of what you’re originally doing and step out of the time--but always have it in mind. So two things going on at once, I guess.
I believe this sort of technique can be heard throughout his solo on The Way You Look Tonight from The Art of the Trio Vol. Two.
How is this technique implemented in practice? That is, what does it specifically entail? I'm looking for a detailed explanation of this technique and I'm exclusively interested in the manner in which Brad's trio used it. I'd really like the explanation to be supported by examples (just citing times from his solos would be plenty).