Land Rover Discovery Owners & Service Manuals

Land Rover Discovery: USB / CD Data Disk Audio File Compatibility

NOTE:

Before attempting a repair to the in-vehicle infotainment system following concerns regarding no playback of audio files stored either on a USB data storage device or on a CD data disc, check below to ensure that the audio files in question are encoded in a compatible format

There are a number of variables that can be set (either automatically or by the user) at the point of creating the audio file that may contribute to an audio file being encoded in an incompatible format. These include:

  • The type of audio file created (MP3/WMA/AAC)
  • The specification of Variable Bit Rate (VBR) or Constant Bit Rate (CBR) encoding
  • If CBR encoding is being used, then a particular bit rate value (measured in kilobits per second - kbps) may be selected
  • The rate of sampling frequency, measured in kilohertz (kHz), may also be selected

Diagnostic Procedures For Audio Files

Identify File Type: if a customer reports issues with audio file playback, first confirm that the data source is operating normally and is not locked or corrupted. This may be achieved by reading the USB storage device or data disk via a PC and confirming that the audio files can be seen/accessed as expected. If the storage device/data disk appears to be operating normally, the next step is to ascertain the file type of those files that will not play through the infotainment system. There are three types of compatible audio file, either MP3 (which must have a file extension of .mp3); or WMA (which must have a file extension of .wma); or AAC (which must have a file extension of either .aac or .m4a). If the affected audio files are not of these types, then successful playback via the infotainment system may not be possible.

Further information about the audio file may be accessed via the file properties tab either when viewing the file in Windows Explorer or when playing the file via a digital media player programme. In such a way, it should be possible to ascertain some or all of the required information concerning the file's specified encoding type/bit rate/sampling frequency.

Once this information has been obtained, use the tables detailed below to check if the suspect audio file is compatible with the vehicle infotainment system.

Playback Of Audio Files Stored On A USB Storage Device

USB MP3 Files (only if file extension is '.mp3'): Playback of MP3 audio files encoded in Variable Bit Rate (VBR) format is supported at bit rates between 8-320 kbps. For Constant Bit Rate (CBR) files, see table below for compatible sampling rates and bit rates.

Playback Of Audio Files Stored On A USB Storage Device

USB WMA Files (only if file extension is '.wma'): Playback of WMA audio files encoded in Variable Bit Rate (VBR) format and created using Windows Media Player Version 8.0 and/or Version 9.0 is supported at bit rates between 5-384 kbps. For Constant Bit Rate (CBR) files, see table below for compatible sampling rates and bit rates. Note that WMA CBR files created using Windows Media Player Versions 7.0, 8.0 and 9.0 can be supported, while playback will be attempted but cannot be guaranteed for files created using Windows Media Player Versions 4.0, 4.1, 9 Beta and 9.1.

Playback Of Audio Files Stored On A USB Storage Device

Playback Of Audio Files Stored On A USB Storage Device

USB AAC Files (only if file extension is '.aac' or '.m4a'): Playback of AAC audio files encoded in Variable Bit Rate (VBR) format is supported at bit rates between 8-320 kbps. For Constant Bit Rate (CBR) files, see table below for compatible sampling rates and bit rates.

Playback Of Audio Files Stored On A USB Storage Device

Playback Of Audio Files Stored On A USB Storage Device

Playback Of Audio Files Stored On A CD Data Disk

CD Data Disk MP3 Files (only if file extension is '.mp3'): Playback of MP3 audio files encoded in Variable Bit Rate (VBR) format is supported at bit rates between 8-320 kbps. For Constant Bit Rate (CBR) files, see table below for compatible sampling rates and bit rates.

Playback Of Audio Files Stored On A CD Data Disk

CD Data Disk WMA Files (only if file extension is '.wma'): Playback of WMA audio files encoded in Variable Bit Rate (VBR) format and created using Windows Media Player Version 9.0 is supported at bit rates between 32-192 kbps. For Constant Bit Rate (CBR) files, see table below for compatible sampling rates and bit rates. Note that WMA CBR files created using Windows Media Player Version 9.0 can be supported, while playback will be attempted but cannot be guaranteed for files created using Windows Media Player Versions 4.0, 4.1, 7.0, 8.0, 9 Beta and 9.1.

Playback Of Audio Files Stored On A CD Data Disk

Playback Of Audio Files Stored On A CD Data Disk

CD Data Disk AAC Files (only if file extension is '.aac' or '.m4a'): Playback of AAC audio files encoded in Variable Bit Rate (VBR) format is supported at bit rates between 8-320 kbps. For Constant Bit Rate (CBR) files, see table below for compatible sampling rates and bit rates.

Playback Of Audio Files Stored On A CD Data Disk

    READ NEXT:

     Portable Audio Interface Panel/ USB Power Supply

    If DTC B1252-19 (USB Port General Electrical Failures - Circuit current above threshold) has been logged, the IAM has detected a current draw from the Portable Audio Interface Panel in excess of 1.7

     Software Updates for the Incontrol APPS System

    NOTES: The software update cannot be performed whilst the vehicle is in motion, the software update must be a valid InControl Apps version and the USB flash drive must not be removed until prom

     Diagnosis and Testing Navigation System

    PRINCIPLES OF OPERATION For a detailed description of the information and entertainment system and operation, refer to the relevant Diagnosis and Testing section of the workshop manual. REFER to: Audi

    SEE MORE:

     Crankshaft Rear Seal (G1875871) / Removal and Installation

    SPECIAL TOOL(S) PART(S) REMOVAL All vehicles Disconnect the battery ground cable. Refer to: Specifications (414-01 Battery, Mounting and Cables, Specifications). Raise and support the vehicle. Vehicles with automatic transmission Refer to: Flexplate (303-01B Engine - INGENIUM I4 2.0L Diesel, R

     Front Suspension Front Stabilizer Bar - AWD (G2028382) / Removal and Installation

    PART(S) REMOVAL CAUTION: The suspension arm nuts and bolts must be tightened with the suspension arms in the normal ride position. Failure to follow this instruction may result in premature failure of the bushing. NOTES: Only use clean water as a lubricant for the bushing, if required This proc

    © 2019-2024 Copyright www.lrdisc.com