From owner-freebsd-multimedia  Tue Mar 17 09:33:49 1998
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To: accel@pacific.net.sg
Cc: multimedia@FreeBSD.ORG
Subject: Re: pcaudio volume
In-Reply-To: Your message of "Mon, 16 Mar 1998 16:06:19 +0800"
	<v03110701b1328cc91f06@[165.21.161.136]>
References: <v03110701b1328cc91f06@[165.21.161.136]>
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Date: Wed, 18 Mar 1998 02:33:37 +0900 (JST)
From: NAGAO -abtk- Tadaaki <nagao@cs.titech.ac.jp>
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Hi,

In message <v03110701b1328cc91f06@[165.21.161.136]>,
    accel@pacific.net.sg (Richard Goh) wrote:
[pcaudio's volume is so low]
> Is there a way to set the volume or any documentation on this. I have tried
> the handbook, faq and the archives without much luck.

Here attached a simple sample code to set the volume.
Try to save it as "pcavolume.c", compile it and use, for example:
	./pcavolume 500
(though the message in the code says that volume must be 0-100,
 much larger values can actually be specified.)

Still low? Then try 1000, 2000 ..., as large as can be stored into
"int". :-)

ps.
I'd like to recommend you to buy a sound card and use it instead of
pcaudio which uses your "beep" hardware. (The "beep" hardware is
not designed for high-quality audio sounds :-)

Cheers,
-- Tada 
   NAGAO Tadaaki <nagao@cs.titech.ac.jp>

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Content-Description: pcavolume.c

#include <stdio.h>
#include <fcntl.h>
#include <err.h>
#include <sys/ioctl.h>
#include <machine/pcaudioio.h>

int
main(int argc, char **argv)
{
    int fd;
    audio_info_t ainfo;

    if (argc < 2)
	errx(1, "specify volume(0-100)");

    AUDIO_INITINFO(&ainfo);
    ainfo.play.gain = atoi(argv[1]);

    if ((fd = open("/dev/pcaudioctl", O_RDONLY, 0)) < 0)
	err(1, "/dev/pcaudioctl");

    if (ioctl(fd, AUDIO_SETINFO, &ainfo) < 0)
	err(1, "AUDIO_SETINFO");

    return 0;
}

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