Free Audio Converter is an all-in-one audio converter and extractor, you can also convert files in batches. allowing you to both convert between different format audio files and extract audio from video files to mp3 aac formats. supports many video, high-definition (HD) video, and audio file types including AVI, MPEG, WMV, MP4, FLV, MKV, H.264/MPEG-4 AVC, AVCHD, MP3, WMA, WAV, AAC, FLAC, OGG, APE, among many others.