Subaru Impreza 2012 Instruction Manual page 247

Audio Operations
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About ID3/WMA tags
In MP3/WMA files, you can enter textual attribute information known as
ID3 tags/WMA tags to save information such as track titles and artist
names.
This unit supports ID3v.1.0, 1.1, 2.2, 2.3 and 2.4 tags.
This unit supports the ISO 8859-1, 2, 5 and 7 codes only. Use only the
ISO 8859-1, 2, 5 or 7 codes to record tags. If characters not included in
ISO8859-1, 2, 5 or 7 codes are recorded, they may not be readably
displayed.
This unit supports the WMA tag ASF revision (v1.20.02). WMA tags using
only Unicode are supported. Always use Unicode characters to enter
the information.
* When Ver. 1.x and Ver. 2.x of the ID3 tags both exist, precedence is given to Ver.
2.x.
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USB memory format
The control items in this standard are described below.
• Maximum number of directory layers:
8 layers
• Maximum number of characters for file names:
128 byte
• Supported characters for file names:
A to Z, 0 to 9, and underscore (_)
(Range of alpha-numeric ISO-8859-1)
• Number of files that can be stored in a single memory device:
9999
246 Audio and Visual
<A configuration example of an MP3/WMA-supporting USB memory>
1st layer 2nd layer 3rd layer 4th layer
ROOT
Folder
MP3/WMA file
Supplement
Since there is no tune contained in
the folder 6, the folder in not
displayed. However, it is assigned with
a folder number.