Hi Bernie,
Awave is a program.
I have one called Extreme Sample convertor, some conversions seemed to work ok others were less than useable.

There's a number of these types of programs available. Maybe some work better than others, or I just didn't set something correctly.

Anyway here's a link to a freebie http://www.chickensys.com/products/sw_iteminfo.php?sw_name=Translator+Free
I've downloded it, but haven't used it as yet.
Wish I'd spotted it before going to the expense of purchasing Extreme, as it may have been good enough for my purposes also.

I think a lot of the programs also have demo's to try before you buy.

best wishes
Rikki