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diff --git a/tests/com/jsyn/examples/NotesToTone.java b/tests/com/jsyn/examples/NotesToTone.java
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-/*
- * Copyright 2010 Phil Burk, Mobileer Inc
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-/**
- * If you play notes fast enough they become a tone.
- *
- * Play a sine wave modulated by an envelope.
- * Speed up the envelope until it is playing at audio rate.
- * Slow down the oscillator until it becomes an LFO amp modulator.
- * Use a LatchZeroCrossing to stop at the end of a sine wave cycle when we are finished.
- *
- * @author Phil Burk, (C) 2010 Mobileer Inc
- */
-
-package com.jsyn.examples;
-
-import java.io.File;
-import java.io.IOException;
-
-import com.jsyn.JSyn;
-import com.jsyn.Synthesizer;
-import com.jsyn.data.SegmentedEnvelope;
-import com.jsyn.unitgen.ExponentialRamp;
-import com.jsyn.unitgen.LatchZeroCrossing;
-import com.jsyn.unitgen.LineOut;
-import com.jsyn.unitgen.SineOscillator;
-import com.jsyn.unitgen.UnitOscillator;
-import com.jsyn.unitgen.VariableRateDataReader;
-import com.jsyn.unitgen.VariableRateMonoReader;
-import com.jsyn.util.WaveRecorder;
-
-/**
- * When notes speed up they can become a new tone. <br>
- * Multiply an oscillator and an envelope. Speed up the envelope until it becomes a tone. Slow down
- * the oscillator until it acts like an envelope. Write the resulting audio to a WAV file.
- *
- * @author Phil Burk (C) 2011 Mobileer Inc
- */
-
-public class NotesToTone {
- private final static double SONG_AMPLITUDE = 0.7;
- private final static double INTRO_DURATION = 2.0;
- private final static double OUTRO_DURATION = 2.0;
- private final static double RAMP_DURATION = 20.0;
- private final static double LOW_FREQUENCY = 1.0;
- private final static double HIGH_FREQUENCY = 800.0;
-
- private final static boolean useRecorder = true;
- private WaveRecorder recorder;
-
- private Synthesizer synth;
- private ExponentialRamp envSweeper;
- private ExponentialRamp oscSweeper;
- private VariableRateDataReader envelopePlayer;
- private UnitOscillator osc;
- private LatchZeroCrossing latch;
- private LineOut lineOut;
- private SegmentedEnvelope envelope;
-
- private void play() throws IOException {
- synth = JSyn.createSynthesizer();
- synth.setRealTime(true);
-
- if (useRecorder) {
- File waveFile = new File("notes_to_tone.wav");
- // Default is stereo, 16 bits.
- recorder = new WaveRecorder(synth, waveFile, 1);
- System.out.println("Writing to WAV file " + waveFile.getAbsolutePath());
- }
-
- createUnits();
-
- connectUnits();
-
- setupEnvelope();
-
- osc.amplitude.set(SONG_AMPLITUDE);
-
- // Ramp the rate of the envelope up until it becomes an audible tone.
- envSweeper.current.set(LOW_FREQUENCY);
- envSweeper.input.set(LOW_FREQUENCY);
- envSweeper.time.set(RAMP_DURATION);
-
- // Ramp the rate of the oscillator down until it becomes an LFO.
- oscSweeper.current.set(HIGH_FREQUENCY);
- oscSweeper.input.set(HIGH_FREQUENCY);
- oscSweeper.time.set(RAMP_DURATION);
-
- // Start synthesizer using default stereo output at 44100 Hz.
- synth.start();
-
- // When we start the recorder it will pull data from the oscillator and
- // sweeper.
- if (recorder != null) {
- recorder.start();
- }
-
- // We also need to start the LineOut if we want to hear it now.
- lineOut.start();
-
- // Get synthesizer time in seconds.
- double timeNow = synth.getCurrentTime();
-
- // Schedule start of ramps.
- double songDuration = INTRO_DURATION + RAMP_DURATION + OUTRO_DURATION;
- envSweeper.input.set(HIGH_FREQUENCY, timeNow + INTRO_DURATION);
- oscSweeper.input.set(LOW_FREQUENCY, timeNow + INTRO_DURATION);
-
- // Arm zero crossing latch
- latch.gate.set(0.0, timeNow + songDuration);
-
- // Sleep while the sound is being generated in the background thread.
- try {
- synth.sleepUntil(timeNow + songDuration + 2.0);
- } catch (InterruptedException e) {
- e.printStackTrace();
- }
-
- if (recorder != null) {
- recorder.stop();
- recorder.close();
- }
- // Stop everything.
- synth.stop();
- }
-
- private void createUnits() {
- // Add a tone generators.
- synth.add(osc = new SineOscillator());
- // Add a controller that will sweep the envelope rate up.
- synth.add(envSweeper = new ExponentialRamp());
- // Add a controller that will sweep the oscillator down.
- synth.add(oscSweeper = new ExponentialRamp());
-
- synth.add(latch = new LatchZeroCrossing());
- // Add an output unit.
- synth.add(lineOut = new LineOut());
-
- // Add an envelope player.
- synth.add(envelopePlayer = new VariableRateMonoReader());
- }
-
- private void connectUnits() {
- oscSweeper.output.connect(osc.frequency);
- osc.output.connect(latch.input);
- // Latch when sine LFO crosses zero.
- latch.output.connect(envelopePlayer.amplitude);
-
- envSweeper.output.connect(envelopePlayer.rate);
-
- // Connect the envelope player to the audio output.
- envelopePlayer.output.connect(0, lineOut.input, 0);
- // crossFade.output.connect( 0, lineOut.input, 1 );
-
- if (recorder != null) {
- envelopePlayer.output.connect(0, recorder.getInput(), 0);
- // crossFade.output.connect( 0, recorder.getInput(), 1 );
- }
- }
-
- private void setupEnvelope() {
- // Setup envelope. The envelope has a total duration of 1.0 seconds.
- // Values are (duration,target) pairs.
- double[] pairs = new double[5 * 2 * 2];
- int i = 0;
- // duration, target for delay
- pairs[i++] = 0.15;
- pairs[i++] = 0.0;
- // duration, target for attack
- pairs[i++] = 0.05;
- pairs[i++] = 1.0;
- // duration, target for release
- pairs[i++] = 0.1;
- pairs[i++] = 0.6;
- // duration, target for sustain
- pairs[i++] = 0.1;
- pairs[i++] = 0.6;
- // duration, target for release
- pairs[i++] = 0.1;
- pairs[i++] = 0.0;
- // Create mirror image of this envelope.
- int halfLength = i;
- while (i < pairs.length) {
- pairs[i] = pairs[i - halfLength];
- i++;
- pairs[i] = pairs[i - halfLength] * -1.0;
- i++;
- }
- envelope = new SegmentedEnvelope(pairs);
-
- envelopePlayer.dataQueue.queueLoop(envelope, 0, envelope.getNumFrames());
- }
-
- public static void main(String[] args) {
- try {
- new NotesToTone().play();
- } catch (IOException e) {
- e.printStackTrace();
- }
- }
-
-}
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