This free audio merger can help you merge and concatenate your audio files, it can join and combine multiple audio files into one file. The tool supports various audio clips, such as MP3, M4A, MIDI, WAV and more. These files will be connected one by one in the order you entered. You need to select at least two files, the third and fourth files are optional. The tool will try to maintain the audio quality so that it can be as good as the source file. In addition, if you need merge more than four audio files, you should select the first four audio files and create the first output file, then use this output file as the first file and attach the remaining audio files, if you have many video files, you need repeat this process. The output format is MP3 audio.