The Roland SP-404 Mk2 is a popular groovebox that can deliver a great beat if you know how to use it. If you’re seeking greater control than is available out of the box, though, you might like to try a custom pedal built by [Romain Dereu]. The concept is simple enough—[Romain] whipped up a bespoke MIDI device to specifically control various features of the SP-404. The microcontroller is built into a pedal-style enclosure with a big toggle switch and a foot switch. Meanwhile, if you’re whipping your own custom MIDI gear at home, we always love to see it land on our tipsline!