The Electro-Harmonix Pitch Fork®+ Polyphonic Pitch Shifter/Harmony Pedal is Now in Stock and Shipping | Bass Gear Magazine
DIGITECH BWHAMMY Bass Whammy Pedal 2 Mode Pitch Shift Effect With True-Bypass - Bill's Music
Amazon.com: Koogo Harmonizer Digital Pedal Harmony Pitch Shifter Detune For Electric Guitar Bass With Storage Of Timbre Sound Pedal, LEF-3807 : Musical Instruments