Getting a new DataLine.info object NOT using a wav file help?

[Addez]

Hi.
I'm trying to create a sound that should play a certain frequency (Hopefully 40 MHz)
But Im having problems creating the DataLine.info object.

I get this error:

java.lang.IllegalArgumentException: No line matching interface SourceDataLine supporting format PCM_UNSIGNED 44100.0 Hz, 16 bit, stereo, 4 bytes/frame, big-endian is supported.

At this line:

auline = (SourceDataLine) AudioSystem.getLine(info);

That is mainly because the format Im using is made up. Its not taking by any audioinputstream.getFormat().
This is because I have no wav file that I wish to play.

What I want to do is create a sound of a frequency and that is all.

To run this just write new PlayFrequency() in a main method.
Heres my whole code:

import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.SourceDataLine;
 

public class PlayFrequency extends Thread { 
    private final int EXTERNAL_BUFFER_SIZE = 524288; // 128Kb 
    float sampleRate = 44100.0f;
    int sampleSizeInBits = 16;
    int channels = 2;
    boolean signed = false;
    boolean bigEndian = true;
    
    enum Position { 
        LEFT, RIGHT, NORMAL
    };
 
    public PlayFrequency() { 
    	this.start();
    } 
 
 
    public void run() { 
 
       
       
 
        AudioFormat format = new AudioFormat(sampleRate, sampleSizeInBits, channels, signed, bigEndian); 
        SourceDataLine auline = null;
        DataLine.Info info = new DataLine.Info(SourceDataLine.class, format);
 
        try { 
            auline = (SourceDataLine) AudioSystem.getLine(info);
            auline.open(format);
        } catch (LineUnavailableException e) { 
            e.printStackTrace();
            return;
        } catch (Exception e) { 
            e.printStackTrace();
            return;
        } 
 
        System.out.println("Start");
        auline.start();
        
        int nBytesRead = 1000;
        byte[] abData = new byte[EXTERNAL_BUFFER_SIZE];
        boolean ok = true;
        try { 
            while (true) { 
            	nBytesRead = getFrequency(abData,5000,10000);
            	System.out.println(abData);
                if (nBytesRead >= 0){
                	auline.write(abData, 0, nBytesRead);
                }
            } 
        } finally { 
            auline.drain();
            auline.close();
        } 
    } 
    
    private int getFrequency(byte[] abData, int i, int j) {
    	boolean ok = true;
    	int bytesRead = 0;
		for(byte b : abData){
			if (ok){ //Jumps between 2 diffrent levels creating the sound..
				b = (byte) i;
			} else {
				b = (byte) j;
			}
			ok = !ok;
			bytesRead++;
		}
		return bytesRead;
	}


	public void wait(int time){
		try{
			Thread.sleep(time);
		} catch(Exception e){}
	}
}

[Norm]

To run this just write new PlayFrequency() in a main method.

Why didn't you provide this if its so easy? A completely self contained test program is much better.

[Addez]

After some tweeking, some flashback of recent physic classes I'v finaly found a solution:

import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.SourceDataLine;
 

public class PlayFrequency extends Thread { 
    private final int EXTERNAL_BUFFER_SIZE = 524288; // 128Kb 
    float sampleRate = 44100.0f;
    int sampleSizeInBits = 16;
    int channels = 2;
    boolean signed = true;
    boolean bigEndian = false;
    int tot = 0;
    
    public static void main(String args[]){
    	new PlayFrequency();
    }
    
    enum Position { 
        LEFT, RIGHT, NORMAL
    };
 
    public PlayFrequency() { 
    	this.start();
    } 
 
 
    public void run() { 
 
       
       
 
        AudioFormat format = new AudioFormat(sampleRate, sampleSizeInBits, channels, signed, bigEndian); 
        SourceDataLine auline = null;
        DataLine.Info info = new DataLine.Info(SourceDataLine.class, format);
 
        try { 
            auline = (SourceDataLine) AudioSystem.getLine(info);
            auline.open(format);
        } catch (LineUnavailableException e) { 
            e.printStackTrace();
            return;
        } catch (Exception e) { 
            e.printStackTrace();
            return;
        } 
 
        System.out.println("Start");
        auline.start();
        
        int nBytesRead = 1000;
        byte[] abData = new byte[EXTERNAL_BUFFER_SIZE];
        boolean ok = true;
        try { 
            while (true) { 
            	nBytesRead = abData.length;
            	abData = getFrequency(50000,90000);
            	printAbdata(abData);
                if (nBytesRead >= 0){
                	auline.write(abData, 0, nBytesRead);
                }
            } 
        } finally { 
            auline.drain();
            auline.close();
        } 
    } 
    
    private void printAbdata(byte[] abData) {
    	for(int i = 0; i <10; i++){
    		byte b = abData[i];
    		System.out.print(b+"-");
    		
    	}
    	System.out.println(abData[10]);
	}


	private byte[] getFrequency( int low, int high) {
    	boolean ok = true;
    	byte[] abData = new byte[EXTERNAL_BUFFER_SIZE];
    	int bytesRead = 0;
    	int posX = 0;
    	
		for(int i = 0; i <EXTERNAL_BUFFER_SIZE; i++){
			if (ok){
				abData[i] = -1;
			} else {
				abData[i] = (byte)(128*Math.sin(posX));
			}
			
			ok = !ok;
			bytesRead++;
			posX++;
		}
		return abData;
	}


	public void wait(int time){
		try{
			Thread.sleep(time);
		} catch(Exception e){}
	}
}

THO I still need help.
This only plays extremly high and annoying pitch sounds.
How can I make the sound go from like 0 Hz to 40MHz?

[Addez]

Epic lol.
Just realised that this code:

abData[i] = (byte)(128*Math.sin(posX));

Can be replaced by:

abData[i] = (byte)(A*Math.sin(posX*P));

Where A is amplitude and P changes the period thus creating
higher or lower pitches :D

For all those reading this now who needs this code:
Feel free to use! No restrictions whatsoever :P