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// Enable WebMidi.jsWebMidi.enable(function (err) { if (err) { console.log("WebMidi could not be enabled.", err); } // Viewing available inputs and outputs console.log(WebMidi.inputs); console.log(WebMidi.outputs); // Display the current time console.log(WebMidi.time); // Retrieving an output port/device using its id, name or index var output = WebMidi.getOutputById("123456789"); output = WebMidi.getOutputByName("Axiom Pro 25 Ext Out"); output = WebMidi.outputs[0]; // Play a note on all channels of the selected output output.playNote("C3"); // Play a note on channel 3 output.playNote("Gb4", 3); // Play a chord on all available channels output.playNote(["C3", "D#3", "G3"]); // Play a chord on channel 7 output.playNote(["C3", "D#3", "G3"], 7); // Play a note at full velocity on all channels) output.playNote("F#-1", "all", {velocity: 1}); // Play a note on channel 16 in 2 seconds (relative time) output.playNote("F5", 16, {time: "+2000"}); // Play a note on channel 1 at an absolute time in the future output.playNote("F5", 16, {time: WebMidi.time + 3000}); // Play a note for a duration of 2 seconds (will send a note off message in 2 seconds). Also use // a low attack velocity output.playNote("Gb2", 10, {duration: 2000, velocity: 0.25}); // Stop a playing note on all channels output.stopNote("C-1"); // Stopping a playing note on channel 11 output.stopNote("F3", 11); // Stop a playing note on channel 11 and use a high release velocity output.stopNote("G8", 11, {velocity: 0.9}); // Stopping a playing note in 2.5 seconds output.stopNote("Bb2", 11, {time: "+2500"}); // Send polyphonic aftertouch message to channel 8 output.sendKeyAftertouch("C#3", 8, 0.25); // Send pitch bend (between -1 and 1) to channel 12 output.sendPitchBend(-1, 12); // You can chain most method calls output.playNote("G5", 12) .sendPitchBend(-0.5, 12, {time: 400}) // After 400 ms. .sendPitchBend(0.5, 12, {time: 800}) // After 800 ms. .stopNote("G5", 12, {time: 1200}); // After 1.2 s. // Retrieve an input by name, id or index var input = WebMidi.getInputByName("nanoKEY2 KEYBOARD"); input = WebMidi.getInputById("1809568182"); input = WebMidi.inputs[0]; // Listen for a 'note on' message on all channels input.addListener('noteon', "all", function (e) { console.log("Received 'noteon' message (" + e.note.name + e.note.octave + ")."); } ); // Listen to pitch bend message on channel 3 input.addListener('pitchbend', 3, function (e) { console.log("Received 'pitchbend' message.", e); } ); // Listen to control change message on all channels input.addListener('controlchange', "all", function (e) { console.log("Received 'controlchange' message.", e); } ); // Listen to NRPN message on all channels input.addListener('nrpn', "all", function (e) { if(e.controller.type === 'entry') { console.log("Received 'nrpn' 'entry' message.", e); } if(e.controller.type === 'decrement') { console.log("Received 'nrpn' 'decrement' message.", e); } if(e.controller.type === 'increment') { console.log("Received 'nrpn' 'increment' message.", e); } console.log("message value: " + e.controller.value + ".", e); } ); // Check for the presence of an event listener (in such cases, you cannot use anonymous functions). function test(e) { console.log(e); } input.addListener('programchange', 12, test); console.log("Has event listener: ", input.hasListener('programchange', 12, test)); // Remove a specific listener input.removeListener('programchange', 12, test); console.log("Has event listener: ", input.hasListener('programchange', 12, test)); // Remove all listeners of a specific type on a specific channel input.removeListener('noteoff', 12); // Remove all listeners for 'noteoff' on all channels input.removeListener('noteoff'); // Remove all listeners on the input input.removeListener();});