AMR Converter Pro 4.0
Powerful and fast batch converter for AMR, MP3, WAV, WMA, OGG, AAC, AC3, AIFF, AU, VOX, RAW, PCM, ADPCM, A-LAW, u-LAW, MP2, FLAC, ALAC, CD, M4A, MP4, or WavPack through an easy-to-use interface 
Settings for complete output control are provided, including bitrate, frequency, channels, logging, and overwrite protection. Convert an entire folder (recursive subfolder support) or files from any number of folders with ease.