Lexus 2013 IS250 Owner's Manual page 342

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Compatible device formats
The following device format can be used:
• USB communication format: USB2.0 FS (480 Mbps)
• File system format: FAT16/32 (Windows)
• Correspondence class: Mass storage class
MP3, WMA and AAC files written to a device with any format other than
those listed above may not play correctly, and their file names and folder
names may not be displayed correctly.
Items related to standards and limitations are as follows:
• Maximum directory hierarchy: 8 levels
• Maximum number of folders in a device: 3000 (including the root)
• Maximum number of files in a device: 9999
• Maximum number of files per folder: 255
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MP3, WMA and AAC files
MP3 (MPEG Audio LAYER 3) is a standard audio compression format.
Files can be compressed to approximately 1/10 of their original size using MP3
compression.
WMA (Windows Media Audio) is a Microsoft audio compression format. This
format compresses audio data to a size smaller than that of the MP3 format.
AAC is short for Advanced Audio Coding and refers to an audio compression
technology standard used with MPEG2 and MPEG4.
MP3, WMA and AAC file and media/formats compatibility are limited.

MP3 file compatibility
• Compatible standards
MP3 (MPEG1 AUDIO LAYERIII, MPEG2 AUDIO LAYERIII)
• Compatible sampling frequencies
MPEG1 AUDIO LAYERIII: 32, 44.1, 48 (kHz)
MPEG2 AUDIO LAYERIII: 16, 22.05, 24 (kHz)
• Compatible bit rates (compatible with VBR)
MPEG1 AUDIO LAYERIII: 32-320 (kbps)
MPEG2 AUDIO LAYERIII: 8-160 (kbps)
• Compatible channel modes: stereo, joint stereo, dual channel and monaural

WMA file compatibility
• Compatible standards
WMA Ver. 7, 8, 9 (only compatible with Windows Media Audio Standard)
• Compatible sampling frequencies
32, 44.1, 48 (kHz)
• Compatible bit rates (only compatible with 2-channel playback)
ver. 7, 8: CBR 48-192 (kbps)
ver. 9: CBR 48-320 (kbps)

AAC file compatibility
• Compatible standards
MPEG4/AAC-LC
• Compatible sampling frequencies
11.025/12/16/22.05/24/32/44.1/48 (kHz)
• Compatible bit rates
16-320 (kbps)
• Compatible channel modes: 1ch and 2ch
IS250_EE(OM53B11E)
5-6. Using an external device
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