There are two ways to backup and transfer your iPhone music tracks to your PC:
Do smart backup of your iPhone /iPod /iPad music using CopyTrans.
Choose smart backup, if you would like to copy your iPhone /iPod /iPad library to the iTunes on your PC. The contents of your device will be compared with the iTunes library. Your iPhone songs, videos and playlists will be automatically transferred to your iTunes, without creating duplicates.
Do manual backup of your iPhone /iPod /iPad music to your PC using CopyTrans.
Choose manual backup, if you would like to transfer iPhone music, videos and playlists to a selected folder on your PC. Manual backup also allows you to transfer tracks and playlists of your choice from your iPhone to the iTunes on your PC.