I've been building a portable MPE keyboard and wanted to share where it's at. It uses hall effect mechanical switches which give continuous position data through the full key travel and I'm using that for per-key channel pressure via MPE, so each key responds to how hard you're holding it, not just how fast you press it.

In the video its running over Bluetooth the cable is just power since there's no onboard battery yet.

Still very early, but I'm curious what people think