Audio Transcoder is an audio transcoding tool. It can convert AAC, MP3, WAV, WMA, AMR, FLAC, M4A, M4R, MP2, AC3, MKA to MP3, AAC, WAV, WMA, ALAC. You can add multiple tasks at once and set encoding quality. Transcoding progress and remaining time will be shown. The output folder path is customizable. You can also drag and drop audio files to add transcoding tasks. What's more, you can pick videos as source files to extract audios from those videos.