Smart MP3 Converter 2.0

Smart MP3 Converter allows you to convert audio and video files to MP3.
Main features:
- You can convert a lot of files at one time.
- You can remove the added audio.
- You can adjust the play speed.
- Support undo and redo.
- Support history edit view.
- You can use it to play the audio.
- You can set the sampling rate, channels.
- You can select the codec: .copy or .mp3.