Playing Digitized Audio

• Download the 'Sound Library for 291' Sound_lib_291.zip.
  This library contains complete and documented source code to play digitized audio.
  Current Verwion = 2.0a
  1. Run the program SBTEST.EXE.
     It sould play the sample wave file included in the ZIP file.
  2. If no sound plays, check that
     • Your volume is set to an audible level
     • You have an environmental variable set like:
       BLASTER=A220 I5 D1 T4
     • Your control-panel settings for the
       Address, IRQ, and DMA match the BLASTER value.
  3. Read the SB_LIB_291 Documentation included with the package
     • Browse the SBTEST.ASM to use library usage
     • Browse the SBLIB291.ASM to see library implementation
• Do not use DIGPAK for DSP audio.
  That code is buggy and unstable.

Installing MIDPAK

1. Unzip DMKIT.ZIP to your network drive. Be sure to preserve directories
2. Configure your hardware
   1. Run setd to set up your audio hardware.
   2. Select 'y' to autodetect.
   3. For best results, select 'SoundBlaster Clone'
   4. Crank up the volume on the speakers and test the card.
   5. Note the base address, IRQ, and DMA listed at the bottom of the screen -- in particular, note the IRQ number -- usually 5 or 7.
   6. You should hear music (I do in the lab).
   7. Select 'y' if you hear music.
3. Configure your MIDI
   1. Run Setm to install the midi driver
   2. Select 'adlib or compatible'
   3. Select if 'y' if you hear music. (I do in the lab)
4. Now, you need to run the 'MIDPAK.COM' program to actually load the driver.
5. Run the menu program to verify that midi files play. (they should)
6. Develop your program using MIDPKAPI.DOC as a reference and the program REAL\SEGUE.C as a reference. You will need to convert the C routines into ASM.

• Problems with MidPak
  • Do not uninstall midpak driver from within code.
    Rather, stop playing midi (705h), then use MIDPAK u to uninstall driver
  • Include Midpak.com, Midpak.adv, and Midpak.av in same directory as code.

Final Notes

• For more information, carefully read the documentation and source code included with the programs above.
• Remember, the purpose of this class is to be instructional -- not tedious. Your time is best spent writing your own code.