AudioCoder (formally MediaCoder Audio Edition) is a high performance and high quality batch audio transcoder based on MediaCoder. It supports most popular audio formats and can convert from both video and audio files as well as directly from network streams, DVD, CD. On multi-core processors, it is can processes up to 8 transcoding sessions at the same time to significantly improve transcoding speed and thus shortern the time needed to have your audio files encoded.
Features Super fast parallelized audio transcoding
Encodes to most popular audio formats
Converts from audio and video files
Converts from BD/DVD/CD & streaming
2-pass normalization in batch
Tagging and formatted file naming
CUE sheet and M3U playlist support
Supports up to 8 parallel tasks
Native 64-bit version available
Freeware
http://www.mediacoderhq.com/audio/