From Freeware Workshop:
AAC2WMA enables you convert AAC to WMA. Windows Media Audio (WMA) is an audio data compression technology developed by Microsoft. an audio format similar to MP3, but Microsoft claims that audio encoded with WMA sounds better than MP3 at the same bit rate. Now you can enjoy the versatile audios on your Window Media Player wherever and whenever. Simple settings, high speed, and friendly interface. It is very easy to use without any special setting, only a few clicks complete the task of convert audio; It can detect your hardware configuration and decide an optimized convert scheme automatically; Provide greater than 300% converting speed by multithreading, so fast beyond your imagination; Both multithreading and batch conversion supported; Automatically shutdown the computer after conversion.