How can I combine multiple audio/music files into one

I have tried to combine audio with Audaciity several times before. Although it is not the fastest method, it is free and has full functions. You just need to drag several audio clips into it, it will be displayed on different tracks, and then manually combine them into one line, and then export them. It supports MP3, WAV, FLAC and other formats.

However, there is a small disadvantage of using Audaciity to combine multiple audio files into one, which is that you have to arrange the positions yourself every time you combine them, and it cannot be done automatically with one click. But the advantage is that you can edit, reduce noise, and add fade-in and fade-out. If you have requirements for sound quality or details, Audaciity is definitely a good choice, especially for the combine multiple audio files into one scene where you want to process audio well~

Although using Audaciity to combine multiple audio files into one is powerful, it does have several small disadvantages:

1. The operation is manual: unlike the one-click combination of the command line or some software, you have to drag each audio clip to align the timeline yourself, and it is easy to misalign if you are not careful.
2. Not suitable for batch processing: It is very laborious to merge more than ten or twenty files at a time, and it cannot be run automatically like a script.
3. The export settings are complicated: When you use it for the first time, you need to install an additional plug-in (LAME encoder) to export MP3, which may be confusing for novices.

So although Audaciity can meet most of the needs of combining multiple audio files into one, if you want to save trouble and time, the command line or batch tools may be more suitable~