Pedals that stack with the Eventide PitchFactor

Beetronics Buzzter Boost Preamp

Beetronics Buzzter Boost Preamp leans toward transparent, and that's a real, usable character to pair with

Boss BD-2 Blues Driver

What Boss BD-2 Blues Driver brings here leans toward dynamic — that's worth building a pairing around

Keeley Halo

Keep Eventide PitchFactor's shimmer voice out front: Keeley Halo goes after Eventide PitchFactor in the signal chain so its ambient voice doesn't muddy it — goes in the amp's FX loop (or last, into a clean amp)

Walrus Audio Fable

Put Walrus Audio Fable after Eventide PitchFactor in the signal chain, clear of Eventide PitchFactor's own gain stage — goes in the amp's FX loop (or last, into a clean amp)