DeviceOK
SearchCheck my device
Home / Device knowledge / Web MIDI
Browser hardware APIs

Web MIDI: what a browser can see from a MIDI device

Web MIDI lets a compatible web application enumerate permitted MIDI inputs and outputs and send or receive MIDI messages without DeviceOK installing a native driver.

Why it matters

How this changes a diagnosis

If notes, velocity or controller messages arrive in DeviceOK, the MIDI hardware-to-browser path is working. That narrows a failure in a DAW or other application toward application setup, routing or a different driver path rather than a completely silent controller.

Key points

What to remember

  • MIDI messages are control data, not recorded audio.
  • Browser and operating-system support varies, and permission/security rules apply.
  • A browser-visible MIDI result does not prove an unrelated audio-interface path is working.
Use it in DeviceOK

Related live checks

MIDI MonitorSee live MIDI note, velocity, control-change, and pitch-bend messages from a connected MIDI input in supported browsers.
→
MIDI Keyboard TestVerify that MIDI keys send note-on, note-off, and velocity data to the browser.
→
MIDI Velocity TestWatch the velocity values generated by MIDI keys or pads to diagnose fixed, weak, or inconsistent velocity response.
→
Related devices

Where this concept appears

MIDI Keyboard / ControllerUSB Audio Interface