Can anyone explain me this type of modulation?

[robotic mind]

in the lead that start at 2.43i think the guy is using any type of pitch modulation . but how ?

http://www.youtube.com/watch?v=XIOJZkFt4ms&hd=1

[TweakHead]

it's like an acid lead with a busier source, like two sawtooth waves with the second detuned or something. resonance on the filter is what enhances the movement you ear, most likely just the filter envelope kind, so adjust the amount of it and the attack and decay (maybe a slight touch of release to if it sounds weird).

make it mono4 (legatto style) and play with overlapping short notes that don't restart the envelope and then a bigger one with no overlapping, you can grab that kind of phrase next to no time.

then it's filter saturation stuff (really makes it more squelchy), distortion, chorus?, unisson can make it more supersaw-like if you want it, maybe add a touch of noise to... but main thing is the busy source, right mono mode, resonance tweaked just right and filter envelope mod and the style of playing.

[robotic mind]

thanks i wil try it