MP3 to AAC Converter enables you convert MP3 (MPEG-1 Audio Layer 3 or MPEG-2 Audio Layer 3 or MPEG-1 or 2 Audio Layer III) to MPEG4 AAC Audio. Advanced Audio Coding (AAC) is a standardized, lossy compression and encoding scheme for digital audio. AAC generally achieves better sound quality than MP3 at similar bit rates. Now you can enjoy the versatile audios on your Portable 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.