2011 Acura RL Owner's Manual - Page 264

Audio System Depending on the software the files were made with, it may not be possible to play some files, or display some text data. Depending on the type of encoding and writing software used, there may be cases where character information does not display properly. The order of files in USB playback may be different from the order of files displayed in PC or other devices etc. Files are played in the order stored in USB flash memory device. Some devices cannot be powered or charged via the USB adapter. If this is the case, use the accessory adapter to supply power to your device. Some versions of MP3, WMA, or AAC format may not be supported. If an unsupported file is found, the audio unit displays UNSUPPORTED, then skips to the next file. In WMA or AAC format, DRM (digital rights management) files cannot be played. If the system finds a DRM file, the audio unit displays UNPLAYABLE FILE, and then skips to the next file. Voice Control System You can select the AUX mode by using the navigation system voice control buttons, but cannot operate the play mode functions. Combining a low sampling f requency with a low bitrate may result in extremely degraded sound quality. 258