On A Mac And Looking To Get Your Music From Your iOS Device

You may one day experience a problem with your mac and then need to get the music from your iPhone back to your computer.

There are 3 solutions to this problem

Solution 1 

You should have used iTunes Match 

Then all your music , including ripped music is stored with Apple online 

More information can be found here

Solution 2 & 3 are software solutions designed to get the music from your iOS device ( iPhone / iPad ) and back to your computer so you can reimport into iTunes 

Senuti 

DeTune