Wolfson Microelectronics, provider of audio chips for the majority of iPods dating back to the original 2001 model, has been passed over as a supplier for third-quarter 2008 editions of the iPod nano and iPod touch, according to Reuters. Previously omitted from the iPod classic, which has generally been praised for an impressively low noise floor, as well as the first-generation iPod shuffle, which Apple previously acknowledged as the family’s…