US-State M4P MP3 to AAC Backup - The most powerful audio CD (CD-DA) ripper, extract the digital audio track without losing any quality and turns them into the most popular format media files. It supports auto-seraching CDDB info from internet. It also supports four channels mode including Stereo, Join Stereo, Mono and Dual Channel. It rips audio CD tracks and saves them into audio formats such as mp3, wav, wma (Windows Media Audio), VQF (Yamaha SoundVQ), orOGG Vorbis, converts MP3, WAV, WMA, OGG Vorbis from one to another on-the-fly, resamples MP3 to MP3, WAV to WAV, WMA to WMA, OGG to OGG for changing bitrates, frequency, and other options. MP3 Encoder supports CBR (Constant Bit Rate) and VBR (Variable Bit Rate). It's fast, easy to use while powerful.