2012 GMC Acadia Owner's Manual - Page 211

Infotainment System The CD Player reads both uncompressed audio and MP3/ WMA files on a mixed mode disc. Uncompressed audio is played before MP3/WMA files. Press the CAT (category) button to toggle between uncompressed audio and MP3/WMA files. CD‐R or CD‐RW Supported File and Folder Structure The DVD Player supports: ... 7-31 The CD Player supports: ... Root Directory The root directory of the disc is treated as a folder. If the root directory has compressed audio files, the directory displays as F1 ROOT on the radio. If a disc contains both uncompressed CD audio and MP3/WMA files, a folder under the root directory called CD accesses all of the CD audio tracks on the disc. Empty Folder Folders that do not contain files are skipped, and the player advances to the next folder that contains files. No Folder When the disc contains only compressed files, the files are located under the root folder. Up to 512 files and folders. Up to eight folders in depth. Playlists with an .m3u or .wpl extension. Files with an .mp3, .wma, or .cda file extension. . USB Supported File and Folder Structure The radio supports: ... Up to 255 folders. Up to eight folders in depth. Up to 15 playlists. Up to 40 sessions. Playlists with an .m3u or .wpl extension. Files with an .mp3, .wma, or .cda file extension. Up to 700 folders. Up to eight folders in depth. Up to 65,535 files. Folder and file names up to 64 bytes. Files with an .mp3 or .wma file extension. AAC files stored on an iPod. FAT16 FAT32 . . ...