Song sync allows you to download songs from YouTube and set them to a consistent volume using ffmpeg.
Open Source projects used for this software,
https://github.com/FFmpeg/FFmpeg
https://github.com/yt-dlp/yt-dlp
In the event of complaints, the author of the respective api has the right to take down this repository immediately. The same applies to YouTube.
In the even of complaints about the icon image from the application, its just a placeholder. link to the original image: https://www.freepik.com/icon/letter-s_6042213