private void test() throws IOException {
// Create a context for the synthesizer.
synth = JSyn.createSynthesizer();
// Add a tone generator.
synth.add(channelIn = new ChannelIn());
// Add an output mixer.
synth.add(channelOut = new ChannelOut());
synth.add(minner = new Minimum());
synth.add(maxxer = new Maximum());
synth.add(reader = new FixedRateMonoReader());
synth.add(writer = new FixedRateMonoWriter());
sample = new FloatSample(44100 * DELAY_SECONDS, 1);
maxxer.inputB.set(-0.98); // clip
minner.inputB.set(0.98);
// Connect the input to the output.
channelIn.output.connect(minner.inputA);
minner.output.connect(maxxer.inputA);
maxxer.output.connect(writer.input);
reader.output.connect(channelOut.input);
// Both stereo.
int numInputChannels = 2;
int numOutputChannels = 2;
synth.start(
44100,
AudioDeviceManager.USE_DEFAULT_DEVICE,
numInputChannels,
AudioDeviceManager.USE_DEFAULT_DEVICE,
numOutputChannels);
writer.start();
channelOut.start();
// For a long echo, read cursor should be just in front of the write cursor.
reader.dataQueue.queue(sample, 1000, sample.getNumFrames() - 1000);
// Loop both forever.
reader.dataQueue.queueLoop(sample, 0, sample.getNumFrames());
writer.dataQueue.queueLoop(sample, 0, sample.getNumFrames());
System.out.println(
"Start talking. You should hear an echo after " + DELAY_SECONDS + " seconds.");
// Sleep a while.
try {
double time = synth.getCurrentTime();
// Sleep for a while
synth.sleepUntil(time + 30.0);
} catch (InterruptedException e) {
e.printStackTrace();
}
saveEcho(new File("saved_echo.wav"));
// Stop everything.
synth.stop();
}
private void saveEcho(File file) throws IOException {
WaveFileWriter writer = new WaveFileWriter(file);
writer.setFrameRate(44100);
writer.setSamplesPerFrame(1);
writer.setBitsPerSample(16);
float[] buffer = new float[sample.getNumFrames()];
sample.read(buffer);
for (float v : buffer) {
writer.write(v);
}
writer.close();
}