LFO Pitch Stretching with percussive sound?

Hi folks!! does somebody know how to do this technic in the analog four?

MIN: 01:06:55hs. to 01:07:15hs. aprox

I would start by assigning a fast falling saw LFO to volume, then plocking or modulating the LFO rate. Messing with delay time modulation could also work.

I‘d try the arp. Increasing arp speed and playing with arp range and length could give pretty similar results.
Might need some careful tweaking of the amp envelope to get it right on percussive sounds.
Also note length has to be long enough for the arp to work, but not too long.

Turn up arp range while shortening arp length and playing with arp speed gives this glittery, ratching effect.

Could also use a controller with pitch bend wheel assigned to amp decay (pitch up > longer decay, pitch down -> shorter decay) to further enhance the sonic effect of the arp.