218.3 Browsing and Playing USB FilesWith a USB memory device, oran iPod or iPhone connected,and the NAC-N 172 XS USB/iPodinput selected, the display willenter list mode and show thestructure of stored audio files. Usethe handset up (5), down (6), left (3) and ok/list key tobrowse and select items.Note: The memory device or iPod can be safelyconnected or disconnected at any time.Selecting a folder will display the list of files containedwithin and selecting a single file will begin playback.Playback will continue through any list of files containedwithin a folder. The order of play can be shuffled(randomised) by pressing the handset shuffle ( ) key.In long lists of items the handset numeric/text keys can beused to search the list alphabetically.Once playback is underway the NAC-N 172 XS displaywill exit from list mode and revert to normal mode wherethe handset transport keys ( ) can be usedto control playback. To re-enter list mode for further listbrowsing and selection, press the handset ok/list key.During playback, pressing the handset info ( ) key willalternately display data stream info and track elapsedtime.NAC-N 172 XS USB/iPod Inter face8 NAC-N 172 XS USB/iPod InterfaceThe NAC-N 172 XS can play audio files stored on USB memory hardware or iPod andiPhone models connected to the front panel USB socket. Begin by connecting a USBmemory device, iPod or iPhone to the USB socket and selecting USB/iPod input.8.1 USB Media and File CompatibilityUSB memory hardware must be in Windows/DOS format(FAT/FAT32) to be used with the NAC-N 172 XS. Macintoshformats are not compatible.The NAC-N 172 XS can play USB audio files in the followingformats: MP3, M4A, ALAC, AAC, LPCM16/24, FLAC, WMA,WAV, AIFF or Ogg Vorbis. Files must be free of digital rightsmanagement playback restrictions such as the iTunesFairPlay system.8.2 iPod Compatibility and ChargingThe NAC-N 172 XS USB audio interface is compatible with5th generation iPod models, all iPod touch models and theiPhone, iPhone 3 and iPhone 3GS.The NAC-N 172 XS can play iPod and iPhone audio files inthe following formats: MP3, M4A, AAC, ALAC, WAV, AIFFand Apple Lossless.The iPod battery will be charged by default while the iPodis connected. iPod charging options can be changed inthe USB/iPod input setup menu. See Section 4.3.5.USB/iPod 4/18Brilliant Corners.wavGrace and Danger.wavNelly The Elephant.wav4Solid Air.wav