Due to the large number of MIDI players, MIDI utilities and MIDI Sequencers, it is impossible to give specific instructions for each. Rather, use this as a guide to experiment with the many settings that can affect sound quality on your system. Also be aware that one MIDI player may be affected by settings you make in one area, while another player may use entirely different settings. Following are some of the areas where you can experiment at your leisure when you are off line. Make sure you have a MIDI file that you enjoy saved in a folder that is easy to access.
Many applications use the settings that are available from the Windows Multimedia properties sheet.
Double click 'My Computer' which should be on your desktop. Locate and double click 'Control Panel'. Locate and double click 'Multimedia'. Click the MIDI tab. The illustration below is where you should be.