Erwin released a free, open‑source tool that connects Bluetooth LE MIDI keyboards to the new Windows MIDI Services stack, making them appear as standard wired ports to any DAW or Web MIDI app. The utility targets the Roland FP‑90X, a model that pairs easily on Windows 11 but remains invisible to most music software.

The core problem stems from Windows exposing BLE‑MIDI only through the WinRT API, which few DAWs poll. Erwin’s app captures WinRT BLE data, routes it through a WMS loopback endpoint, and presents it as a conventional MIDI port. A second hurdle—notes sent from the PC never sounded—proved to be a channel mismatch: the FP‑90X listens on channel 4 despite a default transmit setting of 1. The program now auto‑detects the correct channel and stores it per device.

Built with .NET 10 and Avalonia, the 21 MB executable requires no installer, telemetry, or account. Microsoft’s Windows MIDI Services team praised the integration, and the generic BLE layer should support other keyboards such as WIDI Master or Korg microKey Air. The project offers a single‑app solution for Windows musicians who have struggled with fragmented workarounds.