I just listened to his "Why We Bleep" podcast episode and found it so fascinating. He did talk about using Mutable Instruments Yarns as part of his live setup to basically get signals from his live drummer and his modular systems instantaniously adapts to the change in tempo/swing. I read somewhere, however, it was perhaps mistated and it's actually a Mutable Instruments Peaks module.
-- mattheo
it's almost definitely yarns... it's a midi input - if the drummer is using a midi enabled kit...
peaks is a versatile module and could be used for this if the drummer was using triggers or contact mics or the like - but the signal may also need amplifying 1st
saying that I can't see either of those modules in the posted rack
"some of the best base-level info to remember can be found in Jim's sigfile" @Lugia
Utility modules are the dull polish that makes the shiny modules actually shine!!!
sound sources < sound modifiers < modulation sources < utilities