Hi,
Could anyone point me to documentation and/or code fragments demonstrating the pitch tracking capabilities added in Control 1.4? Can volume also be tracked?
Thanks very much,
Roger
Pitch tracking documentation
(6 posts) (3 voices)-
Posted 1 year ago #
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I'll try and write up the docs tomorrow. In the meantime, here's the interface that came with the last version of Control. And yes, there's also a AudioVolume widget... works similarly to AudioPitch but with different modes (I think they're
maxandrms).loadedInterfaceName = "Pitch Tracker"; interfaceOrientation = "portrait"; control.storedNote = 0; control.storedNote2 = 0; control.storedNote3 = 0; infoText = "This interface tracks pitch entering the microphone using a technique called Harmonic Product Spectrum. The buttons allow noteon / noteoff capabilities for up to three notes at a time. This interface only sends pitch as MIDI numbers but can be easily modified to send frequencies via OSC.<br><br>Make sure you have a MIDI destination selected when using this interface."; pages = [[ { "name": "playNote", "type": "Button", "bounds": [.0, .0, 1, .25], "isLocal": true, "label": "TRIGGER NOTE", "mode": "momentary", "ontouchstart": "midiManager.sendMIDI('noteon', 1, window.audioP.pitch, 127); control.storedNote = audioP.pitch;", "ontouchend": "midiManager.sendMIDI('noteon', 1, control.storedNote, 0);", }, { "name": "playNote2", "type": "Button", "bounds": [.0, .25, 1, .25], "isLocal": true, "label": "TRIGGER NOTE 2 ", "mode": "momentary", "ontouchstart": "midiManager.sendMIDI('noteon', 1, window.audioP.pitch, 127); control.storedNote2 = audioP.pitch;", "ontouchend": "midiManager.sendMIDI('noteon', 1, control.storedNote2, 0);", }, { "name": "playNote3", "type": "Button", "bounds": [.0, .5, 1, .25], "isLocal": true, "label": "TRIGGER NOTE 3 ", "mode": "momentary", "ontouchstart": "midiManager.sendMIDI('noteon', 1, window.audioP.pitch, 127); control.storedNote3 = audioP.pitch;", "ontouchend": "midiManager.sendMIDI('noteon', 1, control.storedNote3, 0);", }, { "name": "pitchLabel", "type": "Label", "bounds": [0,.8,.3,.1], "value": "pitch", "oninit": "window.pitchLabel.label.style.textWrap = 'none';", "size": 48, }, { "name": "info", "type": "Button", "bounds": [.6, .8, .2, .1], "isLocal": true, "label": "info", "mode": "contact", "stroke": "#aaa", "ontouchstart": "control.changePage('next');" }, { "name": "tabButton", "type": "Button", "bounds": [.8, .8, .2, .1], "mode": "toggle", "stroke": "#aaa", "isLocal": true, "ontouchstart": "if(this.value == this.max) { control.showToolbar(); } else { control.hideToolbar(); }", "label": "menu", }, { "name": "audioP", "type": "AudioPitch", "mode": "hps", "isLocal": true, "onvaluechange": "pitchLabel.setValue(this.noteName)", }, ], [ { "name": "infoText", "type": "Label", "x": .1, "y": .1, "width": .8, "height": .7, "value": infoText, "verticalCenter": false, "align": "left", }, { "name": "backButton", "type": "Button", "x": .8, "y": .9, "width": .19, "height": .09, "mode": "contact", "color": "#333333", "stroke": "#aaaaaa", "protocol": "local", "ontouchstart": "control.changePage(0);", }, { "name": "infoButtonLabel", "type": "Label", "x": .8, "y": .9, "width": .19, "height": .09, "color": "#fff", "value": "back", }, ], ];Posted 1 year ago # -
Thanks very much. Is pitch data only available as a (quantized) MIDI note, or is there an "exact" hz value available as well to reflect slides between notes?
-Roger
Posted 1 year ago # -
There is
pitchand alsofreq. Freq will give you the current hz... it's actually the average of the last 20 windows. Here's the pitch callback in case you're curious:AudioPitch.prototype._onPitchUpdate = function(newFreq) { if(newFreq > 20) this.freqs.unshift(newFreq); // basic averaging var freqTotal = 0; for(var i = 0; i < this.freqs.length; i++) { freqTotal += this.freqs[i]; } this.freq = freqTotal / this.freqs.length; while(this.freqs.length >= this.maxFreqs) { this.freqs.pop(); } this.pitch = Math.round(69 + 12 * Math.log(newFreq / 440) / Math.log(2)); this.octave = Math.round(this.pitch / 12) - 2; this.number = Math.round(this.pitch % 12); if(this.octave < 12 && this.octave > 0) this.noteName = this.noteNames[this.number] + this.octave; else this.noteName = "-"; // console.log("PITCH NAME = " + this.pitch); if(this.onvaluechange != null) { eval(this.onvaluechange); } if(!this.isLocal && _protocol == "OSC") { var valueString = "|" + this.address; valueString += ":" + this.pitch; control.valuesString += valueString; }else if (!this.isLocal && _protocol == "MIDI") { var valueString = "|" + this.midiType + "," + (this.channel - 1) + "," + this.midiNumber+ "," + Math.round(this.pitch); control.valuesString += valueString; } }Posted 1 year ago # -
I've added documentation for both the AudioPitch and AudioVolume widgets.
AudioVolume: http://charlie-roberts.com/Control/?page_id=358
AudioPitch: http://charlie-roberts.com/Control/?page_id=362Posted 1 year ago # -
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