can the bitrate be modified??

It depends on the format, I suppose. However, I suspect that in most cases that it reflects the actual bitrate. Of course, higher bitrates do not guarantee higher quality (just higher possible quality). It shouldn’t be too hard to convert a low bitrate file to a high bitrate file and the quality will be the same (at best).

If you want to know for a specific format, you can try to look up the specifications and find what you need.

@dloser yeah i know, it would be easier to convert a 120 song to a 320 and it would sound 120 anyway even though the bitrate is higher; thats just the frecuency of values taken inside the song etc….

but im curious about the picture because:the value shown in the picture where does it come from? is it data inside the mp3 file (the autor and year are for example) or does windows “scan” the song and discover it ?

For MP3 the bitrate is not stored as those other values, as far as I know. In fact, there isn’t really a fixed bitrate. The file is composed of many separate frames and each has it’s own bitrate, specified at the start of the frame.

“Scanning the song” isn’t really possible, because to read the data, you first need to know which parameters to use, including the bitrate.

Normally it is not a good practice to upscale bitrate since the quality will not get any better and could theoretically get even worse.

Example:

You cannot improve the quality of a printed image after it has been printed? scanning it and reprinting at a better Dpi will keep it the same or even reduce quality…

As far as I know the Artist, Album, comments, year, etc. are saved in the meta data even the image. For the Bitrate I am not too sure.