OpenDAW can record MIDI from multiple connected devices at once, with per-device selection and channel filtering built into its browser workflow. You do not need a desktop MIDI driver layer inside OpenDAW itself, but the browser has to expose the controller first.
The OpenDAW browser music workspace sits on top of Web MIDI for hardware access. Plugging a USB keyboard into the computer is only the first half of the setup. The page still needs permission to see the device, and the browser needs Web MIDI support in the first place.
Once those pieces line up, the actual OpenDAW MIDI keyboard setup is fairly direct. You can record from every connected controller or choose one specific device, then filter the input by MIDI channel before it reaches the track.
Web MIDI also requires a secure context. OpenDAW's public site already runs over HTTPS, so this mostly matters if you host your own build somewhere. Opening an insecure HTTP copy can leave the MIDI request unavailable even when the keyboard, cable, and operating system are completely fine.
Permission is another gate. A supporting browser may prompt when OpenDAW requests access to MIDI devices, and a denied permission can stop the controller from appearing. The browser can remember that choice, which is why unplugging and reconnecting a perfectly good keyboard sometimes changes nothing.
The browser MIDI layer is deliberately low-level. It exposes connected MIDI ports and messages rather than deciding what a knob, pad, or note should mean inside a music app. OpenDAW handles the musical side after the browser has successfully handed it the device.
Channel filtering gives you another layer of control. MIDI devices can send on channels 1 through 16, so OpenDAW can accept all channels or restrict a track to the one you want. This is useful when a controller splits keys, pads, or external hardware across different channels.
Arm the destination track before testing the keyboard. OpenDAW supports arming individual tracks and using Shift to arm several at once, which also allows MIDI from multiple devices to be recorded simultaneously. If notes are reaching the browser but nothing lands in the arrangement, track arming and channel selection are the next places to look.
Step recording is available in the note editor when real-time playing is not what you want. Pressed notes can be entered into the sequence one step at a time, which is handy for dense chords, programming parts slowly, or working with a small controller where performance is not the main goal.
If the keyboard never appears, check the browser before changing anything inside the project. Use a desktop browser with Web MIDI support, confirm the page is running over HTTPS, and inspect the site's MIDI permission. Reconnect the controller only after those basics are settled.
If the device appears but playing produces no notes, move inward. Confirm the correct controller is selected, temporarily accept all MIDI channels, arm the track, and make sure the track has an instrument capable of responding to note input. A controller sending on channel 10 will look dead to a track listening only on channel 1.
Multiple controllers are worth adding only after one works reliably. OpenDAW can capture MIDI from several devices at the same time, so a keyboard can feed one instrument while pads feed another. Give each track a specific device or channel when you need separation, then record the setup once before building a larger routing scheme around it.
The OpenDAW browser music workspace sits on top of Web MIDI for hardware access. Plugging a USB keyboard into the computer is only the first half of the setup. The page still needs permission to see the device, and the browser needs Web MIDI support in the first place.
Once those pieces line up, the actual OpenDAW MIDI keyboard setup is fairly direct. You can record from every connected controller or choose one specific device, then filter the input by MIDI channel before it reaches the track.
Browser support decides whether MIDI appears at all
Chrome and other Chromium-based desktop browsers support Web MIDI, and desktop Firefox has supported it by default since version 108. Safari still does not support the API. Firefox for Android also remains unsupported, so a setup that works on a Windows or Linux laptop may not behave the same way on a phone.Web MIDI also requires a secure context. OpenDAW's public site already runs over HTTPS, so this mostly matters if you host your own build somewhere. Opening an insecure HTTP copy can leave the MIDI request unavailable even when the keyboard, cable, and operating system are completely fine.
Permission is another gate. A supporting browser may prompt when OpenDAW requests access to MIDI devices, and a denied permission can stop the controller from appearing. The browser can remember that choice, which is why unplugging and reconnecting a perfectly good keyboard sometimes changes nothing.
The browser MIDI layer is deliberately low-level. It exposes connected MIDI ports and messages rather than deciding what a knob, pad, or note should mean inside a music app. OpenDAW handles the musical side after the browser has successfully handed it the device.
OpenDAW can narrow the input before recording
OpenDAW lets a MIDI track listen to all connected controllers or one selected device. This matters quickly once more than one piece of gear is attached. A pad controller, keyboard, and hardware sequencer do not all need to dump notes into the same armed instrument.Channel filtering gives you another layer of control. MIDI devices can send on channels 1 through 16, so OpenDAW can accept all channels or restrict a track to the one you want. This is useful when a controller splits keys, pads, or external hardware across different channels.
Arm the destination track before testing the keyboard. OpenDAW supports arming individual tracks and using Shift to arm several at once, which also allows MIDI from multiple devices to be recorded simultaneously. If notes are reaching the browser but nothing lands in the arrangement, track arming and channel selection are the next places to look.
Step recording is available in the note editor when real-time playing is not what you want. Pressed notes can be entered into the sequence one step at a time, which is handy for dense chords, programming parts slowly, or working with a small controller where performance is not the main goal.
A clean test separates browser trouble from MIDI trouble
Start with one keyboard, one USB connection, one armed instrument track, and no channel filtering. Extra routing makes troubleshooting needlessly murky. If OpenDAW receives notes in this simple setup, add your other controllers and channel rules afterward.If the keyboard never appears, check the browser before changing anything inside the project. Use a desktop browser with Web MIDI support, confirm the page is running over HTTPS, and inspect the site's MIDI permission. Reconnect the controller only after those basics are settled.
If the device appears but playing produces no notes, move inward. Confirm the correct controller is selected, temporarily accept all MIDI channels, arm the track, and make sure the track has an instrument capable of responding to note input. A controller sending on channel 10 will look dead to a track listening only on channel 1.
Multiple controllers are worth adding only after one works reliably. OpenDAW can capture MIDI from several devices at the same time, so a keyboard can feed one instrument while pads feed another. Give each track a specific device or channel when you need separation, then record the setup once before building a larger routing scheme around it.
