People told me that there were some iPod recovery software that could recover music from iPod. Tenorshare Data Recovery for Mac is such an iPod recovery software that enables me to preview and recover all contents from the backup file, including your photos, videos, notes, calendar and contacts. Besides, it is available for iPhone, iPad data recovery too. The last and not least, it even can extract all your files after the iOS devices are stolen or broken(can't be used any more). That's amazing!