scratch-audioengine - npm Package Compare versions

Comparing version 0.1.0-prerelease.1478709622 to 0.1.0-prerelease.1478803928

package.json

		{
		"name": "scratch-audioengine",
		"version": "0.1.0-prerelease.1478709622",
		"version": "0.1.0-prerelease.1478803928",
		"description": "audio engine for scratch 3.0",
		@@ -5,0 +5,0 @@ "main": "dist.js",

src/vocoder.js

		/*

		This is a port of Jamison Dance's port of Chris Wilson's WebAudio vocoder.
		This is a port of Jamison Dance's port of Chris Wilson's WebAudio vocoder:
		https://github.com/jergason/Vocoder
		https://github.com/cwilso/Vocoder

		I have adapted it to use the ToneJs library, making it a Tone Effect that
		@@ -46,3 +49,3 @@ can be added to an audio effects chain.

		this.vocoderBands = this.generateVocoderBands(55, 7040, 10);
		this.vocoderBands = this.generateVocoderBands(55, 7040, 8);
		this.initBandpassFilters();
		@@ -103,28 +106,9 @@ this.createCarrier();

		// Create the sine oscillator for the heterodyne
		var heterodyneOscillator = new Tone.Oscillator(this.vocoderBands[i].frequency).start();
		// create a lowpass filtered follower to turn the bandpass filter output into a smooth control
		// signal for the carrier filter
		var follower = new Tone.Follower(0,0);
		modulatorFilterPostGain.connect(follower);
		var followerLowPass = new Tone.Filter(50, 'lowpass');
		follower.connect(followerLowPass);

		// Create the node to multiply the sine by the modulator
		var heterodyne = new Tone.Gain(0); // audio-rate inputs are summed with initial intrinsic value
		modulatorFilterPostGain.connect(heterodyne);
		heterodyneOscillator.connect(heterodyne.gain);

		var heterodynePostGain = new Tone.Gain(2.0);
		heterodyne.connect(heterodynePostGain);

		// Create the rectifier node
		var rectifier = new Tone.WaveShaper([1, 0, 1]);
		heterodynePostGain.connect(rectifier);

		// Create the lowpass filter to mask off the difference (near zero)
		var lpFilter = new Tone.Filter(5, 'lowpass');
		lpFilter.Q.value = 1; // don't need a peak
		rectifier.connect(lpFilter);

		var lpFilterPostGain = new Tone.Gain();
		lpFilter.connect(lpFilterPostGain);

		var waveshaper = new Tone.WaveShaper([1, 0, 1]);
		lpFilterPostGain.connect(waveshaper);

		// Create the bandpass filter in the carrier chain
		@@ -139,6 +123,7 @@ var carrierFilter = new Tone.Filter(this.vocoderBands[i].frequency, 'bandpass', -24);
		// Create the carrier band gain node
		var bandGain = new Tone.Gain(0); // audio-rate inputs are summed with initial intrinsic value
		var bandGain = new Tone.Gain(0);
		carrierFilterPostGain.connect(bandGain);
		waveshaper.connect(bandGain.gain); // connect the lp controller

		followerLowPass.connect(bandGain.gain);

		bandGain.connect(this.outputGain);
		@@ -145,0 +130,0 @@ }

dist.js

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