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Amazon.com: Sustain Pedal for Keyboard - Sovvid Piano Foot Pedal with Polarity Switch for All Brands Electronic Keyboards, MIDI Keyboards, Digital Pianos, Yamaha, Casio, Roland, Korg, Behringer, Moog and More : Musical
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Reversing polarity on Yamaha FC5A Sustain Pedal for Ableton Push 2 compatibility | by Nik Berezovsky | Medium
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