Playing sounds through the PC speaker with Java

[TheOriginalThemePark]

I've found this site that describes how you play sounds with the PC
speaker:

http://fly.cc.fer.hr/GDM/articles/sndmus/speaker1.html

But how can I get access to the hardware port with Java? And if that's
not possible, is there then another way with which I can play tones
with the PC speaker with Java?

 

[Roedy Green]

http://fly.cc.fer.hr/GDM/articles/sndmus/speaker1.html

But how can I get access to the hardware port with Java? And if that's
not possible, is there then another way with which I can play tones
with the PC speaker with Java?

see the sample code on my website
http://mindprod.com/jgloss/products1.html#SPEAKER

you do it in C or assembler and use JNI.

 

[Knute Johnson]

see the sample code on my website
http://mindprod.com/jgloss/products1.html#SPEAKER

you do it in C or assembler and use JNI.

Or you can use JavaSound to make audio on your computer. It uses the
sound card not the PC speaker though.

package javaprojects.classes;

import javax.sound.sampled.*;

public class Tone {
public static void sound(int hz, int msecs, double vol)
throws IllegalArgumentException, LineUnavailableException {

if (vol > 1.0 || vol < 0.0)
throw new IllegalArgumentException("Volume out of range 0.0
- 1.0");

byte[] buf = new byte[msecs * 8];

for (int i=0; i<buf.length; i++) {
double angle = i / (8000.0 / hz) * 2.0 * Math.PI;
buf = (byte)(Math.sin(angle) * 127.0 * vol);
}

// shape the front and back ends of the wave form
for (int i=0; i<20 && i < buf.length / 2; i++) {
buf = (byte)(buf * i / 20);
buf[buf.length - 1 - i] = (byte)(buf[buf.length - 1 - i] *
i / 20);
}

AudioFormat af = new AudioFormat(8000f,8,1,true,false);
SourceDataLine sdl = AudioSystem.getSourceDataLine(af);
sdl.open(af);
sdl.start();
sdl.write(buf,0,buf.length);
sdl.drain();
sdl.close();
}

public static void main(String[] args) throws
LineUnavailableException {
Tone.sound(2000,500,1.0);
}
}

 

[David Segall]

I've found this site that describes how you play sounds with the PC
speaker:

http://fly.cc.fer.hr/GDM/articles/sndmus/speaker1.html

But how can I get access to the hardware port with Java? And if that's
not possible, is there then another way with which I can play tones
with the PC speaker with Java?

You can use the javax.sound API which calls the sound card drivers to
output the sound. Depending on the operating system, you may not need
to actually have a sound card. For example, Microsoft supply a "sound
card driver" that drives the speaker directly
<http://support.microsoft.com/kb/q138857/>.

 

[Roedy Green]

Or you can use JavaSound to make audio on your computer. It uses the
sound card not the PC speaker though.

There is an advantage to using the PC Speaker. I prefer it for error
messages. I often have my volume on my sound turned way down at night
but the PC speaker squawks still come through. You can do them in a
reasonably platform independent way with \007 to the console. I forget
now if System.beep uses the speaker.


see http://mindprod.com/jgloss/beep.html

 

[TheOriginalThemePark]

Well, this sounds perfect, if I can get it to work I'll certainly be
looking at it, but just to make sure I got it right. I access the
speaker by programming something in C and I then access that C program
from Java using JNI, is that correctly understood?

 

[TheOriginalThemePark]

One other thing. Since kernel32.dll in Windows contains a Beep method,
I would be able to use that in my Java program, right?

 

[Roedy Green]

Well, this sounds perfect, if I can get it to work I'll certainly be
looking at it, but just to make sure I got it right. I access the
speaker by programming something in C and I then access that C program
from Java using JNI, is that correctly understood?

Do don't have to write a C program. that is already done as is the
JNI. Just download it and use the Java native classes.

See http://mindprod.com/products1.html#SPEAKER

alternatively install a windows speaker fake sound card driver, use
the usual sound apis and plug your ears with cotton.

 

[Roedy Green]

One other thing. Since kernel32.dll in Windows contains a Beep method,
I would be able to use that in my Java program, right?

as I said, see http://mindprod.com/jgloss/beep.html
which gives you your alternatives.

 

[TheOriginalThemePark]

Yeah, I see now how to do it Just one question though. Since I wanna
make my own C program, and the one in the ZIP file includes windows.h,
where can I get that file?

 

[TheOriginalThemePark]

And can I get a dos.h that also includes the Beep command? I mean, it
would sound weird to me, if that could only be used in Windows, because
the internal speaker also existed while people were using DOS :S

 

[TheOriginalThemePark]

Well, nevermind those questions, I solved them myself. I found a
diskette in a book, I've borrowed that should contain dos.h and it has
outport and inport which I can use. And windows.h, it seems, can be
downloaded here:

http://www.microsoft.com/downloads/...EA3-A93E-40C0EC4F68E5&displaylang=en#filelist

Now my only remaining question is, whether or not there are commands in
windows.h like outport and inport from dos.h?