1) The Parallel port mode in the BIOS must be set to EPP (default is ECP.) To get into your computer’s BIOS, you’ll need to reboot (or turn on) the machine. Immediately when you see the bootup logo or memory/hard drive check, press the appropriate key (which varies from computer to computer – check your computer’s documentation if you’re unsure) until it enters the setup. This will be before Windows boots, and typically it only waits for 1-2 seconds for you to press the key. The most likely keys are DEL, F1, and F2, but could also be any of the F-keys (you can usually press multiple keys at the same time if you’re unsure.) Within the BIOS, you should select Integrated Peripherals. If you don’t see this option, try Advanced, and within this menu, look for I/O Configuration, Peripheral Configuration, or something of the like- it varies from system to system. This is where you’ll change the parallel port mode. Then follow onscreen instructions on how to exit and save changes.
NOTE: You will need to reboot twice in a row for this to work with your MIDI interface.
2) Legacy SoundBlaster emulation:
It is known that many SoundBlaster cards will share the parallel port IRQ without telling you.
Select the DEVICE MANAGER tab, and look for Creative Misc. Devices.
If found, double-click anything that says Legacy Emulation, and checkmark the Disable. Hit OK.
If not found, check in your Sound, Video, and Game controllers for anything that says Legacy Emulation or Legacy Audio and disable that.