General java sound capability questions

im trying to get a handle on the basics of what i can do with sound in java. ive read a lot of pages but there are still some ambiguities.
what i want to do ideally is have an applet that takes sound from the client microphone and records the sound file on a server. so:
if this were an applet, would it require me to first save the sound file locally (and therefore sign the applet?) or can the sound be saved in memory somehow without creating a "file" per se - then moved to the server? if it could be done does it require JMF?
i read that an applet cannot convert the file format client-side. does that mean the file would have to be uploaded in an uncompressed format?
a java webstart app is also acceptable for my purposes. can someone advise if that is the best way to go?
can a web start app do the following:
- connect to a database (on the server)?
- record / compress / upload a sound?
if so, i guess java web start is the way to go... if you know any good resources for any of these issues please let me know... thanks!

BamaColtsFan wrote:
Hey Gang,
I know that the general rule here is to try your code first then ask why it doesn't work but my questions right now are more conceptual than anything else. I know a little (very little, really) about Java and some of it's capabilities. I've been thinking about possibly converting a MS Access Utility that I use into a Java program. The MS Access version can be a little unstable and I think by moving to Java, I can eliminate that problem. But, I want to be sure that Java can do everything I need it to do before I spend a lot of time only to find I can't get there from here. These are my initial questions:
1. I have to run several reports from a large Oracle system. Currently, I export the data as Excel files and link the Access database to them. Using Java, will I be able to export as text files (daily) and have the program read the text and treat it like a database file? The short answer is NO. The more lengthy answer is yes, but you can attach to Excel spreadsheets through ODBC (JDBC/ODBC Bridge) and use them as a database the same way Access did.
2. Part of the output of the Access database feeds MS Word mail-merge documents that are used to send e-mail messages. Will Java format and send e-mail via Outlook? NO, but you can send mail with the Java Mail API.
3. The second half of the output is an Excel Workbook with re-formatted and cleaned report data from the original files. Can Java dynamically pass information to Excel and create the various worksheets necessary to display the data the way management wants to see it? NO
Now having said all of that, there is the Java interface through OpenOffice, which will support MS-Office documents. The MS Office products are Windoz specific, and as such, there are some 3rd party Classes out there that will interface to them, but not directly from Sun's standard API.

Similar Messages

A few general java.nio.* questions

Hi,
I've been reading up on selectors and channels for networking programming. During my reading I came across this website, http://www.javaworld.com/javaworld/jw-09-2001/jw-0907-merlin.html
It's kind of dated (3 years ago) but the example they provide on non-blocking I/O still compiles.
Further in the article (http://www.javaworld.com/javaworld/jw-09-2001/jw-0907-merlin-p4.html) they mention a few "gotcha's" with using selectors. One in particular that caught my attention was "a selector can have only 63 channels registered, which is probably not a big deal."
So only 63 channels max can be registered to a selector ? I searched around the web and the java API looking to confirm this. Does anyone know this to be true or if the max 63 registered channels was dropped before java 1.4 beta became the stable release of java 1.4? The article was written when java 1.4 was in beta.
Lastly, do selectors weed out dropped socket connections? For example. Say I have 500 socket (TCP/IP) connections to a server of mine. Of those 500 , 100 are now closed by the client by the time the server comes around to send them data. As the server loops through the 500 connections using a selector, will there be a delay because 100 connections are dropped and the server must wait for a timeout before proceeding to send the data to the next connection or does the selector detect these 100 dropped connections and only use the 400 still connected?
I hope this last question makes sense.
Thanks in advance,
Nick

Hi,
I've been reading up on selectors and channels for
networking programming. During my reading I came
across this website,
http://www.javaworld.com/javaworld/jw-09-2001/jw-0907-m
rlin.html
It's kind of dated (3 years ago) but the example they
provide on non-blocking I/O still compiles.
Further in the article
(http://www.javaworld.com/javaworld/jw-09-2001/jw-0907-
erlin-p4.html) they mention a few "gotcha's" with
using selectors. One in particular that caught my
attention was "a selector can have only 63 channels
registered, which is probably not a big deal."
So only 63 channels max can be registered to a
selector ? I searched around the web and the java API
looking to confirm this. Does anyone know this to be
true or if the max 63 registered channels was dropped
before java 1.4 beta became the stable release of java
1.4? The article was written when java 1.4 was in
beta.I don't know if that limit of 63 is still there, but it probably makes sense to use a pool of threads each supporting a Selector if the number of connections gets that high.
Lastly, do selectors weed out dropped socket
connections? For example. Say I have 500 socket
(TCP/IP) connections to a server of mine. Of those 500
, 100 are now closed by the client by the time the
server comes around to send them data. As the server
loops through the 500 connections using a selector,
will there be a delay because 100 connections are
dropped and the server must wait for a timeout before
proceeding to send the data to the next connection or
does the selector detect these 100 dropped connections
and only use the 400 still connected?closed channels are removed by the select statement. When using non-blocking IO, nothing waits anyway.
I hope this last question makes sense.
Thanks in advance,
Nick

Simple Java Sound Question...

Can I draw waveforms while capturing data? If yes, how. If no, why.
Thanks. I need the answer ASAP, please help.

Hi nfactorial,
Can I draw waveforms while capturing data?If you would like to do that in Java you would need to know about how to use the Java language in general and especially about the Java Sound and Java2D APIs.
If yes, how.It would be too much to explain to answer such a general question. A general answer is, you need to use the Java Sound API to capture the data for which a waveform should be drawn. The Sound API delivers data as a stream of bytes typically encoded in pulse coded modulation (PCM) format. The data stream has digital samples each representing a level of sound pressure for a certain point in time. The stream of samples in the amplitude/time domain need to be transformed to a spectrum of samples in the amplitude/frequency domain, i.e. a number of PCM samples need to be mapped to the frequencies that should be displayed. This is done with the fast fourier transformation algorithm. Each set of amplitude/frequency values can then be displayed as a waveform by using some line drawing logic. The entire process would need to run constantly, i.e. as bytes are received from the sound data stream transformation and drawing is triggered.
Related readings:
Java Tutorial
http://java.sun.com/docs/books/tutorial/
Java Sound Documentation
http://java.sun.com/j2se/1.5.0/docs/guide/sound/index.html
Java Sound API Programmer's Guide
http://java.sun.com/j2se/1.5.0/docs/guide/sound/programmer_guide/contents.html
Java Sound Resources
http.//www.jsresources.org
Java 2D Graphics Tutorial
http://java.sun.com/docs/books/tutorial/2d/index.html
Wikipedia on fast fourier transformation
http://en.wikipedia.org/wiki/Fast_fourier_transform
HTH
Ulrich

Question about Java Sound example?

Hello,
I found this example AudioPlayer, when searching for an example of how to play .wav files in Java.
The code seems quite long, and wondered if anyone could advise if this is the best way to play a wav file?
And could anyone explain if the EXTERNAL_BUFFER_SIZE should allows be set to 128000;
Thank you
import java.io.File;
import java.io.IOException;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.SourceDataLine;
public class SimpleAudioPlayer
     private static final int     EXTERNAL_BUFFER_SIZE = 128000;
     public static void main(String[] args)
            We check that there is exactely one command-line
            argument.
            If not, we display the usage message and exit.
          if (args.length != 1)
               printUsageAndExit();
            Now, that we're shure there is an argument, we
            take it as the filename of the soundfile
            we want to play.
          String     strFilename = args[0];
          File     soundFile = new File(strFilename);
            We have to read in the sound file.
          AudioInputStream     audioInputStream = null;
          try
               audioInputStream = AudioSystem.getAudioInputStream(soundFile);
          catch (Exception e)
                 In case of an exception, we dump the exception
                 including the stack trace to the console output.
                 Then, we exit the program.
               e.printStackTrace();
               System.exit(1);
            From the AudioInputStream, i.e. from the sound file,
            we fetch information about the format of the
            audio data.
            These information include the sampling frequency,
            the number of
            channels and the size of the samples.
            These information
            are needed to ask Java Sound for a suitable output line
            for this audio file.
          AudioFormat     audioFormat = audioInputStream.getFormat();
            Asking for a line is a rather tricky thing.
            We have to construct an Info object that specifies
            the desired properties for the line.
            First, we have to say which kind of line we want. The
            possibilities are: SourceDataLine (for playback), Clip
            (for repeated playback)     and TargetDataLine (for
            recording).
            Here, we want to do normal playback, so we ask for
            a SourceDataLine.
            Then, we have to pass an AudioFormat object, so that
            the Line knows which format the data passed to it
            will have.
            Furthermore, we can give Java Sound a hint about how
            big the internal buffer for the line should be. This
            isn't used here, signaling that we
            don't care about the exact size. Java Sound will use
            some default value for the buffer size.
          SourceDataLine     line = null;
          DataLine.Info     info = new DataLine.Info(SourceDataLine.class,
                                                             audioFormat);
          try
               line = (SourceDataLine) AudioSystem.getLine(info);
                 The line is there, but it is not yet ready to
                 receive audio data. We have to open the line.
               line.open(audioFormat);
          catch (LineUnavailableException e)
               e.printStackTrace();
               System.exit(1);
          catch (Exception e)
               e.printStackTrace();
               System.exit(1);
            Still not enough. The line now can receive data,
            but will not pass them on to the audio output device
            (which means to your sound card). This has to be
            activated.
          line.start();
            Ok, finally the line is prepared. Now comes the real
            job: we have to write data to the line. We do this
            in a loop. First, we read data from the
            AudioInputStream to a buffer. Then, we write from
            this buffer to the Line. This is done until the end
            of the file is reached, which is detected by a
            return value of -1 from the read method of the
            AudioInputStream.
          int     nBytesRead = 0;
          byte[]     abData = new byte[EXTERNAL_BUFFER_SIZE];
          while (nBytesRead != -1)
               try
                    nBytesRead = audioInputStream.read(abData, 0, abData.length);
               catch (IOException e)
                    e.printStackTrace();
               if (nBytesRead >= 0)
                    int     nBytesWritten = line.write(abData, 0, nBytesRead);
            Wait until all data are played.
            This is only necessary because of the bug noted below.
            (If we do not wait, we would interrupt the playback by
            prematurely closing the line and exiting the VM.)
            Thanks to Margie Fitch for bringing me on the right
            path to this solution.
          line.drain();
            All data are played. We can close the shop.
          line.close();
            There is a bug in the jdk1.3/1.4.
            It prevents correct termination of the VM.
            So we have to exit ourselves.
          System.exit(0);
     private static void printUsageAndExit()
          out("SimpleAudioPlayer: usage:");
          out("\tjava SimpleAudioPlayer <soundfile>");
          System.exit(1);
     private static void out(String strMessage)
          System.out.println(strMessage);
}

I didnot go thru the code you posted but I know that the following workstry {
        // From file
        AudioInputStream stream = AudioSystem.getAudioInputStream(new File("audiofile"));
        // From URL
        stream = AudioSystem.getAudioInputStream(new URL("http://hostname/audiofile"));
        // At present, ALAW and ULAW encodings must be converted
        // to PCM_SIGNED before it can be played
        AudioFormat format = stream.getFormat();
        if (format.getEncoding() != AudioFormat.Encoding.PCM_SIGNED) {
            format = new AudioFormat(
                    AudioFormat.Encoding.PCM_SIGNED,
                    format.getSampleRate(),
                    format.getSampleSizeInBits()*2,
                    format.getChannels(),
                    format.getFrameSize()*2,
                    format.getFrameRate(),
                    true);        // big endian
            stream = AudioSystem.getAudioInputStream(format, stream);
        // Create the clip
        DataLine.Info info = new DataLine.Info(
            Clip.class, stream.getFormat(), ((int)stream.getFrameLength()*format.getFrameSize()));
        Clip clip = (Clip) AudioSystem.getLine(info);
        // This method does not return until the audio file is completely loaded
        clip.open(stream);
        // Start playing
        clip.start();
    } catch (MalformedURLException e) {
    } catch (IOException e) {
    } catch (LineUnavailableException e) {
    } catch (UnsupportedAudioFileException e) {
    }

Java Programming Language questions...???

Hi everybody....
Can I post here my questions about Java Programming Language....or only to to the relevant Sun's forum....http://forum.java.sun.com/index.jspa???
My greetings,
Simon

Simon,
sure, the worst thing that could happen is that people point you to the SUN forum. Usually this forum answers general Java questions.
Frank

Quick & dirty concerning Java sound?

I want to capture a song from a CD and play it in a Java applet- no problem capturing it as a .wav file or whatever, using RealJukebox, etc.
My question is what kind of compression to use, since an uncompressed CD wave file would be tough on 56k connections (even though Java sound apparently can stream) and take up a lot of disk space. Is JMStudio useful for compressing?

Thanks- I've seen that. I've also seen some contradictory (presumably older) documentation at http://java.sun.com/docs/books/tutorial/applet/appletsonly/sound.html claiming that Java sound only supports the .au format. I'm not familiar with .au or .aiff and I was hoping maybe somebody knows what's useful for conpressing a song from CD to fair quality & low bit-rate. On the other hand, this tidbit:
"Problem: Some of my audio files won't play.
Solution: You cannot play WAV, AU, AIFF, or AU files compressed using ADPCM or other compression schemes. The Java Sound engine supports only linear PCM audio files."
makes it sound as if I can forget about low bit-rate...

Linux and Java sound - map mixers to devices

Hi,
I have a question regarding Java Sound API and Linux. I need to query a list of sound devices and let the user choose one of them for further audio operations. This works using the
AudioSystem.getMixerInfo()call. However, the names of the mixers are not very useful. I find the following mixers:
Intel [plughw:0,0], version 1.0.23
Intel [plughw:0,2], version 1.0.23Is there a way to get better names, similar to what Gnone or KDE sound panels display?
When I run the same code under Windows, the output is much better.

Try the code from the following article:
http://www.developerfusion.com/article/84314/wired-for-sound/

Using the 'java.sound.*' libraries and classes

Hello,
I am a complete noob to Java. So please forgive me if I seem a little stupid in the things I ask.
I would like to know which development kit I should download to be able to gain access to the 'java.sound.*' and midi libraries and classes.
I downloaded the Java SE 6 SDK but I could get access to these classes.
I use JCreator as my compiler and I kept getting an error along the lines of 'java.sound.* package does not exist'. I have tried compiling the code with NetBeans and also wiuth Eclipse and I still have no luck and I get the same message. I am guessing the compiler is not the problem and it is the SDK as I can access other classes such as javax.swing and java.awt etc.
If you could give me a link to the relevant SDK and maybe a good compiler, it would be greatly appreciated.
Also I am using Windows XP and Windows Vista so if you could provide me with support for either of these operating systems then that would be great.
Thank You
Lee

Here's the code for an SSCCE (Small Self Contained Compilable Example) of a working java sound application. If you don't provide a file name, It does expect you to have a wave file of Ballroom Blitz in your javatest directory, but doesn't everybody?
To build and run it do:
javac -cp . SoundPlayer.java
java -cp . SoundPlayer yourWaveFile.wav
import java.io.*;
import javax.sound.sampled.*;
import javax.sound.sampled.DataLine.*;
public class SoundPlayer implements LineListener
     private float bufTime;
     private File soundFile;
     private SourceDataLine line;
     private AudioInputStream stream;
     private AudioFormat format;
     private Info info;
     private boolean opened;
     private int frameSize;
     private long frames;
     private int bufFrames;
     private int bufsize;
     private boolean running;
     private boolean shutdown;
     private long firstFrame, lastFrame;
     private float frameRate;
     private long currentFrame;
     private float currentTime;
     private Thread playThread;
     // constructor, take a path to an audio file
     public SoundPlayer(String path)
          this(path, 2);     // use 2 second buffer
     // or a path and a buffer size
     public SoundPlayer(String path, float bt)
          this(new File(path),bt);
     public SoundPlayer(File sf)
          this(sf, 2); // use 2 second buffer
     public SoundPlayer(File sf, float bt)
          bufTime = bt;          // seconds per buffer
          soundFile = sf;
          openSound();
     private void openSound()
          System.out.println("Opening file"+soundFile.getName());
          try
               firstFrame = 0;
               currentFrame = 0;
               shutdown = false;
               running = false;
               stream=AudioSystem.getAudioInputStream(soundFile);
               format=stream.getFormat();
               if(format.getEncoding() != AudioFormat.Encoding.PCM_SIGNED)
                    System.out.println("Converting Audio stream format");
                    stream = AudioSystem.getAudioInputStream(AudioFormat.Encoding.PCM_SIGNED,stream);
                    format = stream.getFormat();
               frameSize = format.getFrameSize();
               frames = stream.getFrameLength();
               lastFrame = frames;
               frameRate = format.getFrameRate();
               bufFrames = (int)(frameRate*bufTime);
               bufsize = frameSize * bufFrames;
               System.out.println("frameRate="+frameRate);
               System.out.println("frames="+frames+" frameSize="+frameSize+" bufFrames="+bufFrames+" bufsize="+bufsize);
               info=new Info(SourceDataLine.class,format,bufsize);
               line = (SourceDataLine)AudioSystem.getLine(info);
               line.addLineListener(this);
               line.open(format,bufsize);
               opened = true;
          catch(Exception e)
               e.printStackTrace();
     public void stop()
          System.out.println ("Stopping");
          if(running)
               running = false;
               shutdown = true;
               if(playThread != null)
                    playThread.interrupt();
                    try{playThread.join();}
                    catch(Exception e){e.printStackTrace();}
          if (opened) close();
     private void close()
          System.out.println("close line");
          line.close();
          try{stream.close();}catch(Exception e){}
          line.removeLineListener(this);
          opened = false;
     // set the start and stop time
     public void setTimes(float t0, float tz)
          currentTime = t0;
          firstFrame = (long)(frameRate*t0);
          if(tz > 0)
               lastFrame = (long)(frameRate*tz);
          else lastFrame = frames;
          if(lastFrame > frames)lastFrame = frames;
          if(firstFrame > lastFrame)firstFrame = lastFrame;
     public void playAsync(float start, float end)
          setTimes(start,end);
          playAsync();
     // play the sound asynchronously */
     public void playAsync()
          System.out.println("Play async");
          if(!opened)openSound();
          if(opened && !running)
               playThread = new Thread(new Runnable(){public void run(){play();}});
               playThread.start();
     public void play(float start, float end)
          setTimes(start,end);
          play();
     // play the sound in the calling thread
     public void play()
          if(!opened)openSound();
          if(opened && !running)
               running = true;
               int writeSize = frameSize*bufFrames/2; // amount we write at a time
               byte buf[] = new byte[writeSize];     // our io buffer
               int len;
               long framesRemaining = lastFrame-firstFrame;
               int framesRead;
               currentFrame=firstFrame;
               System.out.println("playing file, firstFrame="+firstFrame+" lastFrame="+lastFrame);
               try
                    line.start();
                    if(firstFrame > 0)
                         long sa = firstFrame * frameSize;
                         System.out.println("Skipping "+firstFrame+" frames="+sa+" bytes");
                         while(sa > 0)sa -= stream.skip(sa);
                    while (running && framesRemaining > 0)
                         len = stream.read(buf,0,writeSize); // read our block
                         if(len > 0)
                              framesRead = len/frameSize;
                              framesRemaining -= framesRead;
                              currentTime = currentFrame/frameRate;
                              if(currentTime < 0)throw(new Exception("time too low"));
                              System.out.println("time="+currentTime+" writing "+len+" bytes");
                              line.write(buf,0,len);
                              currentFrame+=framesRead;
                         else framesRemaining = 0;
                    if(running)
                         line.drain();                     // let it play out
                         while(line.isActive() && running)
                              System.out.println("line active");
                              Thread.sleep(100);
                         shutdown = true;
                    running = false;
               catch(Exception e)
                    e.printStackTrace();
                    shutdown = true;
                    running = false;
               if(shutdown)
                    close();
     // return current time relative to start of sound
     public float getTime()
          return ((float)line.getMicrosecondPosition())/1000000;
     // return total time
     public float getLength()
          return (float)frames / frameRate;
     // stop the sound playback, return time in seconds
     public float pause()
          running = false;
          line.stop();
          return getTime();
     public void update(LineEvent le)
          System.out.println("Line event"+le.toString());
     // play a short simple PCM encoded clip
     public static void playShortClip(String fnm)
          java.applet.AudioClip clip=null;
          try
               java.io.File file = new java.io.File(fnm);     // get a file for the name provided
               if(file.exists())                    // only try to use a real file
                    clip = java.applet.Applet.newAudioClip(file.toURL()); // get the audio clip
               else
                    System.out.println("file="+fnm+" not found");
          catch(Exception e)
               System.out.println("Error building audio clip from file="+fnm);
               e.printStackTrace();
          if(clip != null)     // we may not actually have a clip
               final java.applet.AudioClip rclip = clip;
               new Thread
               (new Runnable()
                         public void run()
                              rclip.play();
               ).start();
     public boolean isOpened()
          return opened;
     public boolean isRunning()
          return running;
    public void showControls() {
        Control [] controls = line.getControls();
        for (Control c :controls) {
            System.out.println(c.toString());
    public void setGain(float gain) {
        FloatControl g = (FloatControl) line.getControl(FloatControl.Type.MASTER_GAIN);
        g.setValue(gain);
    public static void main(String [] args) {
        float gain = 0;
        String file = "c:\\javatest\\BallroomBlitz.wav";
          for(String arg : args) {
            for(int i = 0; i < arg.length(); i++) {
                char c = arg.charAt(i);
                if (c == '-') {
                    gain -= 1;
                } else if (c == '+') {
                    gain += 1;
                } else {
                         file = arg;
        SoundPlayer sp = new SoundPlayer(file);
        sp.showControls();
        System.out.println("setting gain to " + gain);
        sp.setGain(gain);
        sp.play();
}

How to implement effects in java sound

I have read the programmer's guide in java sound and it said there that it can generate effects such as distortion, delay and others. I would like to implement some of those, I can already capture and play sound from a microphone but I don't know how to manipulate the data to get my desired effect. Can someone explain the content of the array of bytes? I also hope you can give me some hints or anything that could help me implement my own effect. Thanks in advance!

going_infinity wrote:
The contents of the double array do not exceed the range. They are mostly of -0.07 o 0.07.
I forgot to post this code, this is how byte was transformed to a double array. I am just extending an existing codeAh, yes...that makes a lot more sense. I assumed you were reading from the line as double, and that wouldn't work. But you're already converting it, which is why everything stays in the range you'd expect.
"Weirdness" solved.
If I use the double array or the byte array, how can I implement some effects like echo or reverb? I understand that since the "raw data" provides amplitude, I can get it's frequency and there is some FFT involved. All I can see here is determining the pitch of the sound but still, no effects. I'm still confused on where to start. Well, it depends on the effect. I'm not an effects expert, so you'll probably want to go do some Google-ing for what all of the affects are...but I think I can explain an echo.
Echo is a function of a variable, decay, which is how quickly an echo will fade away. From a physics perspective, think of decay as friction, it'll eventually stop a moving object.
So, you might implement an echo kinda like the following
for (int i = 0; i < buffer.length; i++) {
     double threshhold = 0.01;
     double decay = 0.5;
     double echo = sample;
     int j = i+1;
     while((Math.abs(echo) > threshhold) && (j < buffer.length)) {
          buffer[j++] += echo;
          echo *= decay;
Where some decreasing-fraction of a sample is added to all samples in the future until it drops below some threshhold.
That may or may not be an "echo" effect, necessarily, as I think that a "true" echo also has a peroid (the delay between the sound and its echo) that I'm not taking into effect, so that effect is probably more like overdrive...but it illistrates the point. You'll have to figure out what each effect "adds" or "subtracts" from the sound, and then loop-through the sound data sequentially adding the effects of the effect.

How to get / view Java Sound source code

Hi All,
I'm curious to view the Java Sound source code, is that possible? Let me know what I have done so far,
1. In eclipse I have mapped the src.zip from the JDK directory, now I am able to view most of the source code.
2. When I try to view AudioSystem.getProviders method it returns value from JDK13Services.getProviders
But I dont have source code for JDK13Services class, indeed i don't have com.sun.media package source code, in the src.zip
Do anyone know how to get com.sun.media package source code?
Thanks in advance,
Karthikeyan R

It appears that the 3rd entry of this search
[http://www.google.com/search?q=JDK13Services]
give both the javadoc and source for JDK13Services, as follows:
[http://www.docjar.org/docs/api/com/sun/media/sound/JDK13Services.html]
The other search listings appear to contain useful information, also.

Where can i get a e-book on java sound?

I want to know where i can download a ebook on java sound.

[http://java.sun.com/j2se/1.5.0/docs/guide/sound/programmer_guide/contents.html]

Cannot recognise any sound devices in Linux using Java sound!

Hi there - I'm new to Java sound, and can't even get my foot in the door on my Linux system. Even thought my speakers and microphone are fully functional on my system (I can record, playback, etc. using other programs) I cannot get Java to find the microphone, speaker, anything. I've tried calling "AudioSystem.isLineSupported(Port.Info.MICROPHONE)", which returns false, as with all the other Port.Info.... objects.
I'm sure there are no programs using my audio devices (used lsof | grep snd and lsof | grep dsp, then killed the only program that had anything open) and I've tried running my Java program as the super-user too, but to no avail.
One thing I CAN do is get sound from /dev/dsp - I can put this into a byte array and play it back later, but I don't know how to find out what sort of codec it uses, how to merge it with Java sound, or anything like that.
Any help would be much appreciated!
If it makes any difference, I'm using Xubuntu 8.10, and I normally don't use a microphone or flashy surround-sound speakers, so I've not touched the sound system since I installed Linux.

Ports are tricky...and by tricky, I don't mean complicated so much as a pain.
Try using Line.Info objects instead of Port.Info objects and see if you can get any lines.

Using Java Sound in Eclipse.

Can anyone tell me where to put the java soundbanks that i downloaded in order to use Java sound in Eclipse?

I'm not familiar with this particular issue, but I believe jsresources.org has lots of information on installing soundbanks.

An I18N bug from java sound should be fixed.

When you try to list some audio related names (such as mix name, port name, control name) by using java sound api, and if the names are writtened by non-ascii character such as Chinese, you will get the strange characters, that means java sound api does not support internationalization character. Here is the sample:
*     SystemMixerFrame.java
* Copyright (c) 2001 - 2002 by Matthias Pfisterer
* All rights reserved.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.BooleanControl;
import javax.sound.sampled.CompoundControl;
import javax.sound.sampled.Control;
import javax.sound.sampled.EnumControl;
import javax.sound.sampled.FloatControl;
import javax.sound.sampled.Line;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.Mixer;
import javax.sound.sampled.Port;
IDEAS:
- user setting tab style vs. show complete windows for multiple mixers (horicontal/vertical)
- user setting unix style (L/R volume) vs. windows style (volume/balance)
/**     TODO:
public class TestSystemMixer {
     /**     TODO:
     private static final Port.Info[]     EMPTY_PORT_INFO_ARRAY = new Port.Info[0];
     public static void main(String[] args) {
          new TestSystemMixer();
          System.exit(0);
     /**     TODO:
     public TestSystemMixer()
          List portMixers = getPortMixers();
          if (portMixers.size() == 0) {
               out("There are no mixers that support Port lines.SystemMixer: Error");
               System.exit(1);
          Iterator iterator = portMixers.iterator();
          while (iterator.hasNext())
               Mixer     mixer = (Mixer) iterator.next();
               String     strMixerName = mixer.getMixerInfo().getName();
               out("mixername:" + strMixerName);
               createMixerPanel(mixer);
     /**     Returns the Mixers that support Port lines.
     private List getPortMixers()
          List supportingMixers = new ArrayList();
          Mixer.Info[]     aMixerInfos = AudioSystem.getMixerInfo();
          for (int i = 0; i < aMixerInfos.length; i++)
               Mixer     mixer = AudioSystem.getMixer(aMixerInfos);
               boolean     bSupportsPorts = arePortsSupported(mixer);
               if (bSupportsPorts)
                    supportingMixers.add(mixer);
          return supportingMixers;
     /**     TODO:
     // should be implemented by:
     // Mixer.isLineSupported(new Line.Info(Port.class))
     private boolean arePortsSupported(Mixer mixer)
          Line.Info[]     infos;
          infos = mixer.getSourceLineInfo();
          for (int i = 0; i < infos.length; i++)
               if (infos[i] instanceof Port.Info)
                    return true;
          infos = mixer.getTargetLineInfo();
          for (int i = 0; i < infos.length; i++)
               if (infos[i] instanceof Port.Info)
                    return true;
          return false;
     /**     TODO:
     private void createMixerPanel(Mixer mixer)
          Port.Info[]     infosToCheck = getPortInfo(mixer);
          for (int i = 0; i < infosToCheck.length; i++)
               Port     port = null;
               try
                    port = (Port) mixer.getLine(infosToCheck[i]);
                    port.open();
               catch (LineUnavailableException e)
                    e.printStackTrace();
               if (port != null)
                    createPortPanel(port);
     /**     TODO:
     private Port.Info[] getPortInfo(Mixer mixer)
          Line.Info[]     infos;
          List portInfoList = new ArrayList();
          infos = mixer.getSourceLineInfo();
          for (int i = 0; i < infos.length; i++)
               if (infos[i] instanceof Port.Info)
                    portInfoList.add((Port.Info) infos[i]);
          infos = mixer.getTargetLineInfo();
          for (int i = 0; i < infos.length; i++)
               if (infos[i] instanceof Port.Info)
                    portInfoList.add((Port.Info) infos[i]);
          Port.Info[]     portInfos = (Port.Info[]) portInfoList.toArray(EMPTY_PORT_INFO_ARRAY);
          return portInfos;
     /**     TODO:
     private void createPortPanel(Port port)
          String     strPortName = ((Port.Info) port.getLineInfo()).getName();
          out("Portname:" + strPortName);
          Control[]     aControls = port.getControls();
//          for (int i = 0; i < aControls.length; i++)
          if (aControls.length > 1) {
               // In fact in the windows system, it named SPEAKER port, and it contains play controls.
               out("ignore the port " + strPortName + " that contains more than one control.");
          } else {
               // this is record control.
               out("control:" + aControls[0].toString());
               createControlComponent(aControls[0]);
               if (aControls[0] instanceof FloatControl)
               else
     /**     TODO:
     private void createControlComponent(Control control)
          if (control instanceof BooleanControl)
          String          strControlName = control.getType().toString();
          out("sub control type BooleanControl:" + strControlName);
          else if (control instanceof EnumControl)
          String     strControlName = control.getType().toString();
          out("sub control type EnumControl:" + strControlName);
          System.out.println("WARNING: EnumControl is not yet supported");
          else if (control instanceof FloatControl)
          String     strControlName = control.getType().toString();
          out("sub control type FloatControl:" + strControlName);
          else if (control instanceof CompoundControl)
          String     strControlName = control.getType().toString();
          out("sub control type CompoundControl:" + strControlName);
          Control[]     aControls = ((CompoundControl)control).getMemberControls();
          for (int i = 0; i < aControls.length; i++)
               Control con = aControls[i];
               if (con instanceof BooleanControl) {
                    out("sub sub control type BooleanControl:" + con.getType().toString());
                    if (strControlName.equalsIgnoreCase("Stereo Mix")) {
                         ((BooleanControl) con).setValue(true);
               else if (con instanceof EnumControl) {
                    out("sub sub control type EnumControl:" + con.getType().toString());
               else if (con instanceof FloatControl)
                    if (isBalanceOrPan((FloatControl) con))
                    out("sub sub control type FloatControl balance:" + con.getType().toString());
                    else
                    out("sub sub control type FloatControl pan:" + con.getType().toString());
               else
     /** Returns whether the type of a FloatControl is BALANCE or PAN.
     private static boolean isBalanceOrPan(FloatControl control)
          Control.Type type = control.getType();
          return type.equals(FloatControl.Type.PAN) || type.equals(FloatControl.Type.BALANCE);
     private static void out(String message)
          System.out.println(message);
/*** SystemMixerFrame.java ***/
Compile and run the code below on non-ascii Windows OS, you will catch the problem.
The solution I provide:
Download the jdk 1.4.2 source, search the files named PortMixer.c && PortMixerProvider.c and replace the method "NewStringUTF" with the method below:
jstring WindowsTojstring2( JNIEnv* env, char* str )
jstring rtn = 0;
int slen = strlen(str);
unsigned short* buffer = 0;
if( slen == 0 )
rtn = (*env)->NewStringUTF(env,str );
else
int length = MultiByteToWideChar( CP_ACP, 0, (LPCSTR)str, slen, NULL, 0 );
buffer = malloc( length*2 + 1 );
if( MultiByteToWideChar( CP_ACP, 0, (LPCSTR)str, slen, (LPWSTR)buffer, length ) >0 )
rtn = (*env)->NewString( env, (jchar*)buffer, length );
if( buffer )
free( buffer );
return rtn;
Rebuild jdk source code as per sun build document. Got the result files and pick up jsound.dll, replace the original jsound.dll in your JRE with the fixed file.
Then the problem solved. I also hope sun will fix the problem in the future version of JDK.
Or any one can help me to submit this article to the sun JDK team.
Jiawei Zhang
From Chinese, The city of Shanghai.
MSN: [email protected]

If you only wanted to get a beep you could have used Toolkit.beep
Very simple and fast.
Rommie.

Capturing audio through applet using Java Sound

hi fellows i need ur help.
I am working on a voice project to Capture & Play the sound using java sound API instead of JMF. I can capture , play and transmit the sound through application. It works pretty fine but when i convert it to the applet, it is not working.
I got the full system permissions and also signed the applet for Internet Explorer. Also i packed the
javax.sound.midi.*
javax.sound.sampled.*
classes in the signed cab.
After doing all this i am getting the AudioFormat not supported exception. I changed the format and used all the combinations but still getting this error
No line matching interface TargetDataLine supporting format PCM_SIGNED, 16000.0 Hz, 16 bit, mono, big-endian, audio data is supported.
java.lang.IllegalArgumentException: No line matching interface TargetDataLine supporting format PCM_SIGNED, 16000.0 Hz, 16 bit, mono, big-endian, audio data is supported.
     at javax/sound/sampled/AudioSystem.getLine (AudioSystem.java:312)
     at com/vsoft/voice/VoiceRecord.run (VoiceApplet.java:93)
     at java/lang/Thread.run (Thread.java)plz help me to sort out this problem.

plz have a look over this problem

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