Capture Sound from Soundcard AND Mic

Hi,
My idea is to make an application to record songs on the fly.
That is a user can play a song from my library and with his mic to
sing along with the song. Now i want to capture those two signals
(the sound from the player and the sound from the mic and record it
with FMS to one .flv file.
The way to capture the mic's sound i know, what i don't know
is how to capture the sound produced by the player.
Is there any way to record the souncards output through flash
or do i have to do some sort of stream that specific sound to fms.
Thanks in advance
Dimitris

On windows, you can use the sound card's mixer to set the
audio source. In the recording view of the mixer, select the
channels you want to record, or choose the "stereo mix".
Unfortunately, this can't be done programatically through
actionscript .
I don't know if it can be done on a Mac, as there isn't a
sound card to speak of.

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    import java.awt.FlowLayout;
    import java.awt.event.ActionListener;
    import java.awt.event.ActionEvent;
    import javax.swing.JFileChooser;
    import javax.swing.JFrame;
    import javax.swing.JButton;
    import javax.swing.JOptionPane;
    import java.io.File;
    import java.io.FileNotFoundException;
    import java.io.InputStream;
    import java.io.FileOutputStream;
    import java.io.ByteArrayInputStream;
    import java.io.ByteArrayOutputStream;
    import javax.sound.sampled.AudioSystem;
    import javax.sound.sampled.AudioFormat;
    import javax.sound.sampled.AudioFileFormat;
    import javax.sound.sampled.AudioInputStream;
    import javax.sound.sampled.DataLine;
    import javax.sound.sampled.SourceDataLine;
    import javax.sound.sampled.TargetDataLine;
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      ByteArrayOutputStream byteArrayOutputStream;
      AudioFormat audioFormat;
      TargetDataLine targetDataLine;
      AudioInputStream audioInputStream;
      SourceDataLine sourceDataLine;
      File file;
    //  AudioFileFormat.Type fileType;
      /** The recorder will request enough memory for this lengh
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      static int minutes = 4;
      /** channels - 1 for mono, 2 for stereo. */
      static int channels = 2;
      /** bytes - 1 means 8 bit, 2 means 16 bit, 3 means 24 bit. */
      static int bytes = 2;
      /** Samples per second, sample rate in Hertz. */
      static int samplerate = 44100;
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      'bytes' of sound depth in 'channels' at 'samplerate'. */
      static int size = samplerate*channels*bytes*60*minutes;
      /** Make the temp buffer, for this fraction of a second. */
      static int timeperiod = 20;
      /** An arbitrary-size temporary holding
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      enough for 3 minutes of sampling in
      stereo at 16 bit, 44100Hz */
      //static byte tempBuffer[];
      static byte tempBuffer[] = new byte[samplerate*channels*bytes/timeperiod];
      public static void main(
        String args[]){
        if (args.length==0) {
          new AudioRecorder(null);
        } else {
          new AudioRecorder(args[0]);
      }//end main
      public AudioRecorder(String outputFileName){//constructor
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        setLocation(100,50);
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          new JButton("Capture");
        final JButton stopBtn =
          new JButton("Stop");
        final JButton playBtn =
          new JButton("Save");
        captureBtn.setEnabled(true);
        stopBtn.setEnabled(false);
        playBtn.setEnabled(false);
        captureBtn.addActionListener(
          new ActionListener(){
            public void actionPerformed(
            ActionEvent e){
              captureBtn.setEnabled(false);
              stopBtn.setEnabled(true);
              playBtn.setEnabled(false);
              captureAudio();
        getContentPane().add(captureBtn);
        stopBtn.addActionListener(
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            public void actionPerformed(
              ActionEvent e){
              captureBtn.setEnabled(true);
              stopBtn.setEnabled(false);
              playBtn.setEnabled(true);
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              // input data from the
              // microphone.
              stopCapture = true;
            }//end actionPerformed
          }//end ActionListener
        );//end addActionListener()
        getContentPane().add(stopBtn);
        playBtn.addActionListener(
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            public void actionPerformed(
              ActionEvent e){
              //Play back all of the data
              // that was saved during
              // capture.
              saveAudio();
            }//end actionPerformed
          }//end ActionListener
        );//end addActionListener()
        getContentPane().add(playBtn);
        getContentPane().setLayout(new FlowLayout());
        setTitle("IMAR");
        setDefaultCloseOperation(
          EXIT_ON_CLOSE);
        setSize(250,70);
        setVisible(true);
        if ( outputFileName==null ) {
          JFileChooser fc = new JFileChooser();
          int returnVal = fc.showSaveDialog(null);
          if(returnVal == JFileChooser.APPROVE_OPTION) {
            outputFileName = fc.getSelectedFile().toString();
          } else {
            outputFileName = "default.wav";
        file = new File(outputFileName);
        FileOutputStream fout;
        try {
          fout=new FileOutputStream(file);
        } catch (FileNotFoundException e1) {
          e1.printStackTrace();
      }//end constructor
      //This method captures audio input
      // from a microphone and saves it in
      // a ByteArrayOutputStream object.
      private void captureAudio(){
        try{
          //Get everything set up for
          // capture
          audioFormat = getAudioFormat();
    /*      AudioFormat.Encoding[] encodings =
            AudioSystem.getTargetEncodings(audioFormat);
          for(int ii=0; ii<encodings.length; ii++) {
            System.out.println( encodings[ii] );
          DataLine.Info dataLineInfo =
            new DataLine.Info(
              TargetDataLine.class, audioFormat);
          targetDataLine = (TargetDataLine)
            AudioSystem.getLine(dataLineInfo);
          targetDataLine.open(audioFormat);
          targetDataLine.start();
          System.out.println( "AR.cA: " + targetDataLine );
          audioInputStream = new
            AudioInputStream(targetDataLine);
          //Create a thread to capture the
          // microphone data and start it
          // running.It will run until
          // the Stop button is clicked.
          CaptureThread ct = new CaptureThread();
          Thread captureThread =
            new Thread(ct);
          captureThread.start();
        } catch (Exception e) {
          e.printStackTrace();
          System.exit(0);
        }//end catch
      }//end captureAudio method
      //This method plays back the audio
      // data that has been saved in the
      // ByteArrayOutputStream
      private void saveAudio() {
        try{
          //Get everything set up for
          // playback.
          //Get the previously-saved data
          // into a byte array object.
          byte audioData[] =
            byteArrayOutputStream.
            toByteArray();
          //Get an input stream on the
          // byte array containing the data
          InputStream byteArrayInputStream
            = new ByteArrayInputStream(audioData);
          AudioFormat audioFormat =
            getAudioFormat();
          AudioInputStream audioInputStreamTemp =
            new AudioInputStream(
              byteArrayInputStream,
              audioFormat,
              audioData.length/audioFormat.
                getFrameSize());
          audioInputStream =
            AudioSystem.getAudioInputStream(
              AudioFormat.Encoding.PCM_SIGNED,
              audioInputStreamTemp );
          DataLine.Info dataLineInfo =
            new DataLine.Info(
            SourceDataLine.class,
            audioFormat);
          sourceDataLine = (SourceDataLine)
            AudioSystem.getLine(dataLineInfo);
          sourceDataLine.open(audioFormat);
          sourceDataLine.start();
          //Create a thread to play back
          // the data and start it
          // running.It will run until
          // all the data has been played
          // back.
          Thread saveThread =
            new Thread(new SaveThread());
          saveThread.start();
        } catch (Exception e) {
          e.printStackTrace();
          System.exit(0);
        }//end catch
      }//end playAudio
      //This method creates and returns an
      // AudioFormat object for a given set
      // of format parameters.If these
      // parameters don't work well for
      // you, try some of the other
      // allowable parameter values, which
      // are shown in comments following
      // the declarations.
      private AudioFormat getAudioFormat(){
        float sampleRate = 44100.0F;
        //8000,11025,16000,22050,44100
        int sampleSizeInBits = channels*8;
        //8,16
    //    int channels = 2;
        //1,2
        boolean signed = true;
        //true,false
        boolean bigEndian = false;
        //true,false
        return new AudioFormat(
          sampleRate,
          sampleSizeInBits,
          channels,
          signed,
          bigEndian);
      }//end getAudioFormat
      //===================================//
      /** Inner class to capture data from
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      class CaptureThread extends Thread{
        public void run(){
          byteArrayOutputStream =
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          stopCapture = false;
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                tempBuffer.length);
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                // object.
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                  tempBuffer, 0, cnt);
              }//end if
            }//end while
            byteArrayOutputStream.close();
          }catch (Exception e) {
            e.printStackTrace();
            System.exit(0);
          }//end catch
        }//end run
      }//end inner class CaptureThread
      /** Inner class to play back the data
      that was saved. */
      class SaveThread
        extends Thread {
        public void run(){
          try{
            if (AudioSystem.isFileTypeSupported(
              AudioFileFormat.Type.WAVE,
                audioInputStream)) {
              AudioSystem.write(audioInputStream,
                AudioFileFormat.Type.WAVE, file);
            JOptionPane.showMessageDialog(null,"Clip Saved!");
          } catch (Exception e) {
            e.printStackTrace();
            System.exit(0);
          }//end catch
        }//end run
      }//end inner class PlayThread
      //===================================//
    }//end outer class AudioCapture.java

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  • Difference in sound from A2Z and DVD home equipment

    Hi,
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    Appreciate if anybody could tell.

    Well sound in this context is made up of 3 componemts: source, amp and speakers. The 3 things to watch are THD (total harmonic distortion), S/N (signal to noise ratio) and Frequency Responce.
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    Hi all,
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    Regards,
    Amit

    Hi Guys,
    I would really appreciate if somebody could reply to my query. Its been very frustating here.
    In the meanwhile I have done the following troubleshooting more :
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    2) Went ahead and removed the creative drive and the application.
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    Regards,
    Amit

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