Can you transfer songs from iPod to iTunes?
To transfer songs to your iTunes music library from your iPhone, iPod or iPad, first open iExplorer on your Mac or PC. Then, go ahead and connect your iPhone, iPad or iPod with its USB cable to your computer. Once the device is connected, iTunes may prompt you to sync your device – click “No” or “Cancel.”
https://macroplant.com/iexplorer/tutorials/how-to-transfer-songs-from-iphone-into-itunes