Reply to High Quality Audio Files

Hey guys,

First if all I wanted to say thanks to everyone on this community for all the help you have given me.

Let's say your going through soundcloud and you find a new track. It's available for free download but I'm assuming that's not going to be the best quality file. If you can't find the track elsewhere does anyone have any suggestions on using the track? How do I know if the mp3 is 128 or 320?

Thanks again