Hi Lauraine!
There are many other softwares that allow the MIDI to WAVE change and some of them have other advantages, for example
1- DC Audio Restoration Tools from Diamond Cut Productions at
http://www.enhancedaudio.com does the recording from MIDI to WAV (provided you can play the MIDI file in another software, by the way you can play MIDI files on the Windows Media Player that comes with Windows XP) but the plus here is that it allows you to improve the recorded WAVE file in a number of ways. In addition if you have old recordings (tapes, 33, 45 or even 78rpm vinyl) it cleans up the recording while converting them to WAVE files. It is also capable of converting mono recordings to stereo (by changing the sound balance) and vice-versa.
2- Cakewalk Home Studio at
www.cakewalk.com plays your MIDI and records the WAVE files. Here you can play with the MIDI by changing instruments or adding new ones. When you finish the recording to WAVE you can also make modifications similar to DC Audio. Also with Cakewalk you can record your own singing in several tracks (a duet with yourself for example, or lay down the melody line and several harmony lines).
3- Digital Orchestrator Plus. This is similar to Cakewalk, but not as versatile. I used it before, but they have not upgraded the software to work well with Windows XP.
Let me know if you need any other suggestions.
Happy singing!
BANDL