There are plenty of sound librarys and code resources out there. For our games we linked to a premade sound blaster library for DJGPP. To add sound to your programs you need link them to 'libsb.a'
Compile your code using this example command line for the compiler:

gcc -o myprog myprog.c libsb.a -lemu

and include this compiler directive at the top of your program:

#include "sb_lib.h"

The other header files in the example download must be in the same directory as sb_lib.h. This will give your prgram access to these functions in sblib.a :

sb_sample * //new data type
sb_load_sample(char *filename,filetype);//filetype _SB_WAV
sb_install_driver(int frequency)//should return SB_SUCCESS
sb_mix_sample(sb_sample*);//play a sound
sb_free_sample(sb_sample*);
sb_uninstall_driver();

There are probably more funstions in the library, examine the header if you think you need more functionality.

Download a working example including libsb

This library was written by Joel H. Hunter (1995) If you are him please mail us!

Legal Stuff:
1> The Sound-Blaster Library for DJGPP V. 2.0 is copyrighted freeware.
You are free to do with it as you please, with the following conditions:
a) If you change/add to/make better this library, send me your changes!
I will maintain all such patches, and re-release a new, better
library that everyone can enjoy and will benefit from!
b) If you create a new library based on this library, give Eric and I
credit, and maintain this freeware policy.
The Sound-Blaster Library for DJGPP V. 2.0 is based in part on VAT. You
can obtain VAT at mack.rt66.com/users/smeagol/vatxxx.zip, and can contact Eric at smeagol@rt66.com.
c) You MAY use this library in a commercial/shareware application,
however, please let me know about it, give me a little credit,
and send me a copy.
2> USE OF THIS LIBRARY IS STRICTLY AT YOUR OWN RISK! THE AUTHOR ASSUMES NO
RESPONSIBILITY FOR TIME, MONEY, AND/OR EQUIPMENT LOST DUE TO THE USE OF THIS LIBRARY.
3> THIS LIBRARY IS NOT GUARANTEED TO WORK SAFELY ON ANY COMPUTER!
4> THIS LIBRARY IS NOT GUARANTEED TO BE SUITABLE FOR ANY SPECIFIC PURPOSE.
5> IF THE ABOVE RESTRICTIONS DO NOT CONFORM TO THE LAWS OF YOUR STATE, YOU MUST NOT USE THIS LIBRARY.