m4a to mp3 or ogg conversion?

[Salviati]

I've got a bunch of m4a audio files, and I'd like to convert them to mp3 or ogg to play on my iRiver, any suggestions as to a freeware (or appropriately uncrippled shareware) utility that could do this?

[hobbit709]

1. Try dbpoweramp

Its free, has no spy/adware, works quite well for me. I've used it for about 8 years now and haven't had any problems. It allows you to rip from cd, line input, convert from one format to another. It even converted copy-protected .wma files.