If sounds are music, then HandBrake isn't a direct music converter, meaning it won't export MP3, WAV, or FLAC files. Nonetheless, you can leverage it to make a video file with simply audio (no visuals). Next, the pure audio should be extracted by using some other audio converter
However, this process is lengthy and uses many tools, thus prompting the earlier question of whether HandBrake can convert audio files! So the answer is no—it’s not practical for converting audio files only.
The Best Alternative: SysTools Audio Converter
As HandBrake fails to meet the requirements for audio conversion, there is a better one which is an automated tool called SysTools Audio Converter. This is software is made for handling audio files and it offers a lot more flexibility than DaVinci.
Important Features of SysTools Audio Converter:
File formats conversion (MP3, WAV, AAC, OGG, FLAC…)
Enable batch conversion of more than one audio file at a time.
It helps you to extract audio out of video files in one click.
Retain pristine quality but you can also change bitrate and codec.
Easy and simple interface for fast conversion.
How to Convert Audio using SysTools Audio Converter?