Audio Extract Kit is not just a completely free batch audio extractor, it is also a powerful audio processing APP that can perform some commonly used audio processing tasks, export lossless MP3, and give you good sound.

The app includes functions such as online extraction,audio extraction,transcode,format coversion,croping,concatenate,split,mixing,voice msg export,fade,volume adjustment,beeping,change tempo,noise reduction,vocal remove,change pitch,extract channels,merge channels,surround sound,audio tag and album cover,audio reverb, Lyrics editing,make ringtone.