Boss OC-3 Super Octave
Boss PS-5 Super Shifter
Electro-Harmonix Fork+ Pitch Fork Plus Pitch Shifter
$213.80
Electro-Harmonix Micro POG Polyphonic Octave Generator
Electro-Harmonix POG2 Polyphonic Octave Generator
$351.20
MXR SF01 Slash Octave Fuzz
$149.99