MIDIOutput

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

The MIDIOutput interface of the Web MIDI API provides methods to add messages to the queue of an output device, and to clear the queue of messages.

EventTarget MIDIPort MIDIOutput

Instance properties

This interface doesn't implement any specific properties, but inherits properties from MIDIPort.

Instance methods

This interface also inherits methods from MIDIPort.

MIDIOutput.send()

Queues a message to be sent to the MIDI port.

MIDIOutput.clear()

Clears any pending send data from the queue.

Examples

The following example sends a middle C immediately on MIDI channel 1.

js
function sendMiddleC(midiAccess, portID) {
  const noteOnMessage = [0x90, 60, 0x7f]; // note on, middle C, full velocity
  const output = midiAccess.outputs.get(portID);
  output.send(noteOnMessage); // sends the message.
}

Specifications

Specification
Web MIDI API
# MIDIOutput

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
MIDIOutput
clear
send

Legend

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Full support
Full support
No support
No support
See implementation notes.