"Cut the Phone" timestretch effect

[splitrmx]

What the hell is Cristian and Jamie using to make that excellent timestretch effect at the very start of "Cut the Phone" on Head on?

-splitrmx

[lucid rinehead]

could be

supercollider
max/msp
reaktor
(or something else entirely)

i don't know much about it but i think all of these can be programmed to do much the same things