MIDI controller connected but software sees nothing
Check whether your MIDI controller sends data, then trace why your music software cannot see it, from USB and browser access to app input settings.
Your MIDI controller is plugged in, but your music software shows no input. The controller may not be sending MIDI data, the computer may not recognize it, or the software may be listening to the wrong input.
Test the controller outside the music software first. The MIDI Test can show whether keys, knobs, pedals, and other controls send messages to your browser. That gives you a useful dividing line before you change settings or reinstall drivers.
Test the controller
- Open the MIDI Test in Chrome or Edge on your computer. MIDI Test does not work in Safari.
- Connect and power on the controller. If the browser asks for MIDI access, allow it. If you have several MIDI devices connected, choose the controller you want to check if the test offers a device list.
- Press several keys, turn a knob, and move a pedal or slider if the controller has one. Try controls that send different kinds of data.
- Look for incoming messages as you use each control. Note whether the test identifies the controller and whether messages appear for keys, knobs, or pedals.
- Close the test, open your music software, and check its MIDI input settings. If the test sees messages but the software does not, focus on the software setup rather than replacing the controller.
Many MIDI controllers do not make sound by themselves. They send instructions, such as which note you pressed, to another device or software instrument. A silent controller can still be sending MIDI correctly.
What the result means
The test receives messages from the controller
The controller and its connection are sending MIDI data to the browser. The problem is more likely the music software's input selection, track setup, or permission to use the device. Check the software fixes below.
The controller appears, but pressing controls sends no messages
The computer or browser can see a MIDI device, but the controls you tried are not producing data. Check that the controller is in its normal MIDI mode, has power, and is connected with a data-capable cable. Some controllers need a separate setting to enable MIDI output.
No controller appears in the test
The browser has not received access to a MIDI device. The computer may not recognize the controller, the browser may lack MIDI support or permission, or another program may be holding the connection. Check the operating system and browser next.
Some controls work, but others do not
The controller is communicating, but one control or message type may be disabled, assigned differently, or faulty. Test several keys and controls. If only one key or knob consistently fails in both the browser and your music software, the issue may be with that control rather than the connection.
How to fix it
- Check power and the cable. Turn the controller on and look for its power light. Try a known data-capable USB cable, not a charge-only cable, and connect directly to the computer instead of through a hub. If it uses an external power supply, check that it is connected.
- Confirm that the computer sees it. In Windows 11, right-click Start and open Device Manager. Check for the controller under Sound, video and game controllers, Software devices, or Universal Serial Bus devices. On macOS, open Applications › Utilities › Audio MIDI Setup, then open MIDI Studio and look for the device. If it is missing there too, try another port or cable and follow the controller maker's setup instructions.
- Allow MIDI access in the browser. When the browser asks to connect to MIDI devices, choose Allow. If you dismissed the prompt, check the site permissions from the icon beside the address bar, restore MIDI access if that option is available, and reload the test. Use Chrome or Edge rather than Safari for this check.
- Close other MIDI programs. Quit music software, MIDI utilities, and background controller tools, then reload the test. Some drivers or applications may not share a device connection reliably. Test again before reopening your music software.
- Select the controller as a software input. In your music software's MIDI or device preferences, enable the controller as an input. Then select it as the input for the track you are using. A track may also need to be armed for recording or have input monitoring enabled before you can hear an instrument respond.
- Check the controller's MIDI mode and channel. Look in its manual or configuration software for settings that enable USB MIDI, select a port, or change the transmit channel. If the software listens on a specific channel, set both sides to match or choose an all-channel input option if available.
- Install or update the manufacturer's driver if needed. Many class-compliant controllers work without a separate driver, but some models require one for full operation. Get the driver and setup instructions from the controller manufacturer, then disconnect and reconnect the device and test again.
- Restart the computer. Restart after changing drivers or if the device remains unavailable in both the browser and the music software. This can clear a stuck connection that did not release when an application closed.
When the controller may be faulty
If the controller is absent from the computer's device list after you try a different data cable and USB port, test it on another computer if possible. If it still does not appear, check its power supply and manufacturer setup steps. A controller that powers on but never sends messages across multiple computers may need repair or replacement. If it is under warranty, contact the seller or manufacturer before opening it.
Why a browser test can help
MIDI data is separate from audio. A MIDI message describes an action, such as a key press or a knob movement, but it is not the sound of a piano or synthesizer. That is why a controller can pass the browser test without playing anything. You need an instrument or sound source in your music software to hear notes.
The browser test also checks the controller from a separate application. If it receives messages while your music software sees none, the controller is probably communicating and the next place to inspect is the software's input and track setup.
