The specified MIDI device is already in use. Wait until it is free, and then try again. After you restart your computer after you changed the volume settings for your computer, the volume settings may revert to the previous settings. Basic Versions 4 and 5. Will show you how to play WAV files using the sndPlaySound API function instead of the MM control.
Full description see waveplay.txt.
Windows How to Install and Use the PC Speaker Driver with Windows Speak.exe contains a Microsoft Windows sound driver that allows most .wav files to be played on the PC speaker on most computers not equipped with a sound card .