Pedals that stack with the Source Audio Atlas

Electro-Harmonix Big Muff Pi

What Electro-Harmonix Big Muff Pi brings here leans toward fuzzy — that's worth building a pairing around

Fulltone OCD

Fulltone OCD leans toward full, and that's a real, usable character to pair with

Walrus Audio Fable

Keep Source Audio Atlas's modulated voice out front: Walrus Audio Fable goes after Source Audio Atlas in the signal chain so its full voice doesn't muddy it — goes in the amp's FX loop (or last, into a clean amp)

Alexander Pedals Radical Delay

Put Alexander Pedals Radical Delay after Source Audio Atlas in the signal chain, clear of Source Audio Atlas's own gain stage — goes in the amp's FX loop (or last, into a clean amp)