
5-29
OTHER CONTROLS AND EQUIPMENT
53MH0-74E
USB device connection
• When connecting a USB device, make
sure that the connector is pushed all the
way into the port.
• Do not leave the USB device for long
periods of time in places inside the vehi-
cle where the temperature can rise too
high.
• Back up any important data beforehand.
We cannot accept responsibility for any
lost data.
• It is recommended not to connect a USB
device that contains data files other than
MP3/WMA/AAC format.
• We recommend against use of USB
devices that are non-standard shape
such as key chains, mobile phone
accessories, etc. which may damage or
stress the connection between USB
device and Socket terminal.
• Always close the USB socket terminal
when not in use, since entry of foreign
material, dust, water, conductive liquids
may damage the audio system or USB
device.
• Device such as MP3 player/Mobile
phone/digital camera may not be rec-
ognized
by the audio system for playing
music.
Recording MP3/WMA/AAC
files on a USB device
• Playback or display may not be possible
depending on the type of USB device in
use or the condition of the recording.
• Depending on the connected USB mem-
ory, the files may be played in different
order from the order that the files were
stored.
• During initialization, the reading time of
USB device may vary depending upon
factors such as file structure, size and
contents other than music files.
• When files recorded contains VBR (vari-
able bit rate), during playback, fast-for-
ward or reverse operation are done.
• The sound quality of MP3/WMA/AAC
files generally improves with higher bit
rate in order to achieve good sound qual-
ity recording with CBR 9continuous bit
rate) of at least 128kbps is recom-
mended.
Compression formats
MP3
• MPEG 1,2 and 2.5 layer III
• Bit rate:
– MPEG-1: 32, 44.1, 48 kHz
– MPEG-2: 16, 22.05, 24 kHz
– MPEG-2.5: 8, 12 kHz
– VBR
• Sampling frequency:
– MPEG-1: 32, 44.1, 48 kHz
– MPEG-2: 16, 22.05, 24 kHz
– MPEG-2.5: 8, 12 kHz
WMA
• Supports only v7/8/9, DRM/Professional/
Loseless/Voice are not supported
• Bit rate:48, 64, 80, 96, 128, 160, 192
kbps
• Sampling frequency:8, 16, 22.05, 32,
44.1 kHz
AAC
• MPEG AAC (Compliant with ISO/
IEC14496-12:2003 + iTunes Meta-data
Specification)
• Bit rate: up to 320kbps
• Sampling frequency:8/11.025/12/16/
22.05/24/32/44.1/48 kHz
• Sampling frequency:8/11.025/12/16/
22.05/24/32/44.1/48 kHz
Maximum number of files/folders
• Maximum number of files: 65280 (files +
folders)
• Maximum number of files in a folder: 256
• Maximum depth of tree structure: 8
• Maximum number of folders: 255
(Root folder is included.)
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