How do you change the default volume of music?

Question

For example, when I play a list of music, all of them are about the same volume, except for one which is way, way too soft to hear. I want to turn up the default volume for ONLY that piece of music. Is there any way?

Answer 1

the source file is probably the culprit  

Answer 2

If you're talking about on iTunes, then right click on the song you want to make louder. Click on 'get info' on the top of the menu. Then click 'options' near the right side and change the volume to however loud you want it.