Re: Sound - Adlib/SB/PC Speaker

[Lionel Pinkhard <lionelp@worldonline.co.za>]

Hi,

Yes, I was aware of that, however, what should I do if I want to make a
quick sound, like for a game? Instead of playing a whole sound file? I
know most modern games use sound files to store their sounds anyway, but
what is the simplest form of a sound in Linux? (Or is this it?)

Thanks for that info! I'll definitely check it out!

Sure, no problem, I've done it under Dos, just a little practise on driver
programming, and I'll have it running under Linux, thanks for the idea!
:-) But would this just be simply turning the speaker on and off rapidly,
or would I use the PIT chip or something?

No sorry, I was a little confused there, I just meant to play sound
directly from the program instead of from an audio file, but now that I
think of it, wouldn't it be possible (it seems anyway) to have a piece of
audio code in your program, and then send it to /dev/audio? But my main
concern is: What would the format of this be? I mean, what do I send to
make a sound? A simple example would be appreciated!

Ciao,

Lionel

On Thu, 12 Oct 2000, Ben Kohlen wrote:

> Writing an audio file to /dev/dsp || /dev/audio is the professional way to 
> do it under linux.  Device files is how you access drivers->hardware on any 
> UNIX.
> 
> If you want to see how a soundblaster driver works, look in the linux source 
> under linux/drivers/sound/sb_*.c (particularly sb_audio.c).
> 
> Look at audio.c to see the implementation of the /dev/audio character 
> device.
> 
> As far as the PC-speaker goes, i've never thought about it, and I am not 
> aware of a /dev/ device associated with it, although i am sure there is one. 
> You always seemed like a guy that didn't mind bare-metal programming, so if 
> you are interested, find the IO range of the hardware and write your own 
> character device for it. (you know how to use inp()/outp() right?) In fact, 
> if anyone wanted a good introduction to writing device drivers under linux, 
> that would be an almost ideal project, as the hardware isn't too complicated 
> and you could mostly focus on learning how linux drivers work. Just get 
> yourself a copy of "Linux Device Drivers" from O'Reilly first, as it is the 
> new definitive guide.
> 
> Real-time sound? no, in fact, i don't think i follow... explain?
> 
> >From: Lionel Pinkhard <lionelp@worldonline.co.za>
> >Reply-To: gameprogrammer@gameprogrammer.com
> >To: gameprogrammer@gameprogrammer.com
> >Subject: Sound - Adlib/SB/PC Speaker
> >Date: Thu, 03 Jan 1980 02:25:47 +0000 (UTC)
> >
> >Hey guys,
> >
> >Can somebody tell me how does Linux sound work? I'm especially interrested
> >in the PC Speaker, since that's what I know the LEAST about, I know that
> >with the other two, it's possible to write a sound file to /dev/audio, or
> >/dev/dsp, but is there a more 'professional' way of doing this? Actually,
> >I'm talking about real-time sound, and not sound from a file, you guys
> >know what I mean?
> >
> >Well, hope somebody can help!!!
> >
> >Lionel
> >
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