How to convert an audio file to MP3 for free

Every now and then you’ll bump up against music in some “strange” format. These formats will definitely have their advantages (lossless / high quality / multiple channel / …) but they don’t fit in your music collection or your favourite player isn’t even able to play the files! I keep my music library in the MP3 format but sometimes get music in .flac, .m4a, .aac, .ogg or something else. The web is full of cheap software which can convert these files for you. But now I finally found a program which does it all for free (freeware, no GPL). It works on Windows (Windows Vista/2008 2000/XP/2003 and Windows 7) and there even is a Mac version (Mac OS X 10.2 or above). It’s called “Switch Sound File Converter” and it’s created by a company called NCH Software which hopes you’ll be some of their other products.