May 1, 2026
Paired, ignored, and totally dramatic
Show HN: Perfect Bluetooth MIDI for Windows
Windows said “paired,” musicians said “where is it?” and the comments got loud
TLDR: A developer made a free tool that finally lets some Bluetooth music keyboards work properly on Windows after the built-in setup left users stranded. Commenters loved the fix but turned the spotlight on the bigger scandal: many still trust cables more than Windows when music timing actually matters.
A tiny free app built by one very determined piano owner has turned into a full-on “wait, Windows does WHAT?” moment on Hacker News. Creator Erwin says he made the tool after buying a Bluetooth-enabled piano, successfully pairing it to Windows 11, and then discovering the musical equivalent of a ghost connection: the computer said yes, the piano said nothing, and his music software acted like the keyboard didn’t exist. His fix makes wireless keyboards show up like normal ones, no extra account, no installer, no creepy tracking — which instantly won points with the crowd.
But the real popcorn-worthy part was the community reaction. One commenter basically dropped the jaw-on-floor question: does this mean tons of Windows musicians can’t actually use Bluetooth MIDI out of the box? That was the thread’s biggest gasp. Others chimed in with the practical musician energy: “cool, but what’s the delay?” and “this is exactly why I stay wired.” The vibe was half applause, half battle scars from years of finicky music gear.
There was also some dark comedy in the debugging story itself. After all the late-night sleuthing, the final villain was hilariously petty: the piano was secretly listening on channel 4 while the obvious setting suggested otherwise. In other words, the instrument was basically saying, “I can hear you, just not in the language I’ve decided to ignore.” The comments read like a support group for people personally victimized by “successful pairing” messages, with a side of cautious optimism now that Windows MIDI Services is finally rolling out.
Key Points
- •The project is a free, open-source Windows utility that bridges Bluetooth LE MIDI keyboards into Windows MIDI Services so DAWs and Web MIDI apps can use them as standard MIDI devices.
- •The author built the tool after a Roland FP-90X paired successfully on Windows 11 but was not visible to his DAW and did not respond to notes sent from the PC.
- •One major issue identified was that Windows exposes BLE-MIDI through WinRT, which the author says most DAWs do not poll; the utility uses Windows MIDI Services loopback endpoints to solve the piano-to-PC path.
- •A separate PC-to-piano issue was traced not to pairing or BLE transport errors but to MIDI channel handling above the GATT layer.
- •The author found the FP-90X receives on MIDI channel 4 despite a default transmit setting of channel 1, and added a channel-detection feature that tests channels 1 through 16 and stores the result per BLE MAC address.