VideoProc Vlogger is a free non-linear video editor from the Digiarty Software Inc. It is a simple but versatile program compatible with Windows and macOS. With it, you can easily add audio to video, without any issue that VLC can bring to you. Besides, you can use it for more operations on the audio files, such as adding effects to the audio, enhancing sound quality, and so forth. And you can access all these features for free, just like VLC does.