5-16
72RH0-74E
USB device connection
• When connecting a USB device, make
sure that the connector is pushed all the
way into the port.
• Depending on the USB flash drive that
you are using, (non-brand product, USB
flash drive that has been externally dam-
aged) it may disable connection or
cause unstable operation.
• 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 format.
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.
• The DRM (Digital Rights Management)
file cannot be played.
Compression formats
MP3
• Bit rate
MPEG1 Audio Layer III: 32 up to 320 kbps
MPEG2 Audio Layer III: 8 up to 160 kbps
MPEG2.5 Audio Layer III: 8 up to 160
kbps
VBR: up to 384 kbps (MAX.)
• Sampling frequency
MPEG1 Audio Layer III: 32/44.1/48 kHz
MPEG2 Audio Layer III: 16/22.05/24 kHz
MPEG2.5 Audio Layer III: 8/11.025/12 kHz
• Channel
Stereo/Joint stereo/Dual channel/Mon-
aural
• ID3 tag
ID3v1.x/ID3v2.x
WMA
• Windows Media Audio Ver.7/Ver.8/Ver.9
Standard compliant
• Bit rate: 32 up to 320 kbps
• VBR: up to 384 kbps (MAX.)
• Sampling frequency: 32/44.1/48 kHz
• WMA tag: Ver.8.0
• Channel: 2 Channels
AAC
• Bit rate: 16 up to 320 kbps
• VBR: up to 320 kbps (MAX.)
• Sampling frequency: 32/44.1/48 kHz
• AAC tag: iTunes m4a metadata
Maximum number of files/folders
• Maximum number of files: 2500
• Maximum number of files in a folder: 255
• Maximum number of folders: 255
– Root folder and empty folder are
included.
• Maximum depth of tree structure: 8
NOTICE
Never use “.mp3”, “.wma” or “.m4a”
as a file name extension if it is not in
the MP3/WMA/AAC format file. Fail-
ure to observe this may result in
damage to the speaker due to noise
production.