Hi Dale,

I get my best midi to wav or mp3 conversions using Itunes. It's free and the conversions are always perfect. It's not advertised for that purpose, but it works like a charm. If you don't have Itunes, you can download it from the web site.
Select the "edit" tab. Select "Preferrences". Under preferrences select the "import" tag. Then select "import using", select "wav encoder" or MP3 Encoder or whatever encoder you wish. Add the midi file to the library, then right click on the file and you will see a selection to convert to whatever encoder you have selected.
Cheers,
Fred