How can I put the music from my ipod into itunes?

My computer was infected with a virus so I had to do a system recovery and couldn't back up my files. I lost all my music and had to reinstall itunes. How can I put the music from my ipod into the newly downloaded itunes?

Cucusoft iTunes to iTunes Transfer is an easy to use iTunes utility designed to help you backup/recover/transfer your whole iTunes library and media files. It's a simple way to keep your iTunes in sync everywhere. You can use "iTunes to iTunes Transfer" to backup your own iTunes library or synchronize multiple iTunes on different computers. The backed up library file is pretty easy to transfer to other iTunes, and it's easy to manage. So with this iTunes Transfer software, you can manage your iPod/iPhone/... on different PCs.

itunes blocks this function since itunes is the tool with one way to transfer files from itune to ipod. you must utilize other tools to achieve that. There're couple of tools for transferring the files between ipod and computer (for backup)depends on your demands, e.g transfer only songs/videos, transfer photos etc. You can have a look of below review site, hope it useful.