To add media from Audible Manager to your iPhone, iPad, or iPod, you need to first 9 or later installed, iTunes makes a copy of the file and adds it to your iTunes library. You can't add protected WMA files or protected WMV files to iTunes.
This can be useful if you have a library of music encoded in WMA format. iPod nano does not support WMA, MPEG Layer 1, MPEG Layer 2 audio files, or audible.com format 1. If you have a song in iTunes that isn’t supported by iPod nano, you…