Here's a quick video of the Litar in action. You can see the Litar is working with battery power over Bluetooth LE MIDI to FL Studio (through a loopback driver since FL Studio doesn't support Bluetooth MIDI yet).

There's still a fair bit of work in the coming weeks to getting a sensible chord and scale mapping for the strings and buttons, as well as velocity and aftertouch effects to actually play some decent music, but the main hardware components and string detection algorithms are working as intended.