Extract audio from video and convert video to audio format. Convert audio files like OPUS, Vorbis, AAC, AC3, DTS, ALAC, OGG, OGA, MP3, WAV, FLAC, WMA, XWM, 3GA, M4A, M4B, MKA, RA, RAM, APE, AU, AUD, AIFF, AIFC, CAF, MPC, QCP, VOC, VOX, GSM, DSS, etc. Directly play video and audio. Edit audio like remove, decrease,increase audio volume; change audio channel 5.1, stereo, mono, merge audio files into one, split audio, compress audio file size etc.