effectspedals ABC-Y Box with MIDI Control Sérgio Sena Electronics Designer, Guitar Player, Vegan More posts by Sérgio Sena. Sérgio Sena 24 Mar 2021 • 1 min read Relay switched IN/OUT and manual footswitch, along with MIDI Control with 128 presets. 🎼✌️https://www.sergiosena.com/products/