Additional Information
! Do not leave the USB portable audio
player/USB memory in high temperature.
! Firmly secure the USB portable audio
player/USB memory when driving. Do not
let the USB portable audio player/USB
memory fall onto the floor, where it may be-
come jammed under the brake or accelera-
tor pedal.
! Depending on the USB devices connected
to this unit, it may generate noise in the
radio.
! There may be a slight delay when starting
playback of audio files on a USB portable
audio player/USB memory with numerous
folder hierarchies.
! Do not connect anything other than the
USB portable audio player/USB memory.
! Operations may vary depending on the
kind of USB audio player and a USB mem-
ory.
Example of a hierarchy
: Folder
: Compressed audio file
Level 1
Level 2
The sequence of audio files on
the disc
! This unit assigns folder numbers. The user
cannot assign folder numbers.
1
2
3
4
5
6
Level 3 Level 4
Black plate (25,1)
! Folder selection sequence or other opera-
tion may be altered depending on the en-
coding or writing software.
! Folder hierarchy is allowed up to eight tiers.
However, a practical hierarchy of folder is
less than two tiers.
! Up to 99 folders on a disc can be played
back.
The sequence of audio files on
USB memory
For USB portable audio players, the sequence is
different from that of USB memory and de-
pends on the player.
! 01 to 05 represent assigned folder num-
bers. 1 to 6 represent the playback se-
quence. The user cannot assign folder
numbers and specify the playback se-
quence with this unit.
! Playback sequence of the audio file is the
same as recorded sequence in the USB de-
vice.
! To specify the playback sequence, the fol-
lowing method is recommended.
1 Create the file name including numbers
that specify the playback sequence (e.g.,
001xxx.mp3 and 099yyy.mp3).
2 Put those files into a folder.
3 Record the folder containing files into the
USB device.
However, depending on the system environ-
ment, you cannot specify the file playback
sequence.
! Up to 15 000 files on a USB portable audio
player/USB memory can be played back.
! Up to 500 folders on a USB portable audio
player/USB memory can be played back.
! Up to eight tiers directory on a USB porta-
ble audio player/USB memory can be
played back.
YRD5220-B/S
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Appendix
25
En
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