Display Sound waves

Question

Hi
I want to display sound wave files on screen like in ECG(Time series) format.
Rahul

Answer 1

Dear Seniors,
i tried to display my sound.wav file in wave format
(wave graph with time in xaxis and frequency in y axix)
i have tried like this. and can get the byte stream as follows.
File file = new File("e:\\munas\\sounds\\myfile1.wav");
System.out.println("File : " + file.exists());
AudioInputStream stream = AudioSystem.getAudioInputStream(file);
AudioFormat format = stream.getFormat();
stream = AudioSystem.getAudioInputStream(format, stream);
// Create line
SourceDataLine.Info info = new DataLine.Info(
SourceDataLine.class, stream.getFormat(),
((int)stream.getFrameLength()*format.getFrameSize()));
SourceDataLine line = (SourceDataLine) AudioSystem.getLine(info);
line.open(stream.getFormat());
line.start();
// Continuously read and play chunks of audio
int numRead = 0;
byte[] buf = new byte[line.getBufferSize()];
while ((numRead = stream.read(buf, 0, buf.length)) >= 0) {
int offset = 0;
while (offset < numRead) {
offset += line.write(buf, offset, numRead-offset);
System.out.println("out.length " + buf.length);
for(int ii = 0 ; ii < buf.length ; ii+=10 ) {
// here i am getting the byte value from the Audio Stream.
System.out.println("buf["+ii+"] : " + buf[ii]);
// using this value i planned to draw the desired graph(time Vs data)
am i right in getting the right stream value for my graph??
if wrong, how to get the data to be presented as i like in graph format??
valuable tips and suggesstions will be appreciated much.
ur junior,
-Munas.