/** Save the double array as a sound file (using .wav or .au format). */
public static void save(String filename, double[] input) {
// assumes 44,100 samples per second
// use 16-bit audio, mono, signed PCM, little Endian
AudioFormat format = new AudioFormat(SAMPLE_RATE, 16, 1, true, false);
byte[] data = new byte[2 * input.length];
for (int i = 0; i < input.length; i++) {
int temp = (short) (input[i] * MAX_16_BIT);
data[2 * i + 0] = (byte) temp;
data[2 * i + 1] = (byte) (temp >> 8);
}
// now save the file
try {
ByteArrayInputStream bais = new ByteArrayInputStream(data);
AudioInputStream ais = new AudioInputStream(bais, format, input.length);
if (filename.endsWith(".wav") || filename.endsWith(".WAV")) {
AudioSystem.write(ais, AudioFileFormat.Type.WAVE, new File(filename));
} else if (filename.endsWith(".au") || filename.endsWith(".AU")) {
AudioSystem.write(ais, AudioFileFormat.Type.AU, new File(filename));
} else {
throw new RuntimeException("File format not supported: " + filename);
}
} catch (Exception e) {
System.out.println(e);
System.exit(1);
}
}
