I’m totally beginner.
I just want to stick a picture to a mp3 (or other audio file format). My song and my image are not commercial. There are not “metadata” about them. Just a mp3 and a picture of mine.
Currently I can drag an audio file in the soft and add a picture in the square at the bottom right. but that’s all. I don’t know how to save.
The “save buton” on the top seam to change nothing when I clic on it.
My purpose is to use it in a hardware mp3 reader.
Can I do it with this soft and, if yes, how do I have to process?