Hi, Sara Jo:

It sounds like you're already using the voices on your computer's sound card as the sound source for your music.

Microsoft gives you a digital sound recorder under the Start/Programs/Accessories/Entertainment menu called, with great creativity, "Sound Recorder". It's been lobotimized to record only 60 seconds at a time, but it will play back any length of .wav file, so you can fool it by loading a longer .wav file and recording over it, then saving it to a different name, so you keep your original longer file.

Use the Start/Progams/Accessories/Entertainment/Volume Control applet to set your recording source as the Wave/MP3 source (or perhaps the Midi source, depending on your sound card; try both); set the volume slider on the Volume Control mixer to about 2/3rds.

Load your .not file into Midinotate and begin recording on the Sound Reorder, then start playback in Midinotate. When it's done, stop them both, and save the .wav file in Sound Recorder.

Voila!

Get enough of those together and you can burn them onto a CD, provided your computer has a CD-RW drive.