The version is 4.01, AMR Converter Pro can convert to and from AMR (Encoder & Decoder), an audio conversion utility for AMR, MP3, WAV, WMA, OGG, and many more audio formats. Settings are provided for bitrate, frequency and channels. Convert from WAV, MP3, WMA, OGG, MP2, AAC, AC3, AMR, 3GP, AIFF, AU, VOX, RAW, GSM, ADPCM, A-LAW,...