Since Switch is no longer free to use as a sound converter, is there another free software you would recommend for converting sound files to use in Audacity?
Sorry for the late reply! Switch is still free, but (as they always have, as far as I know) they offer a commercial version too. I've been using the free version extensively the past two semesters to compress audio podcasts for my university classes.
The free version of Switch is available on www.nch.com.au/switch/index.html