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9. USB AUDIO OPERATIONS
This system can play audio files (MP3/WMA/AAC/
FLAC) stored in an USB memory which is recognized
as "USB Mass Storage Class device". You can use
your USB memory as an audio device by simply
copying desired audio files into it.
Note:
• This system will not operate or may operate improperly
with some USB memory.
• Files protected with any DRM cannot be played.
Notes on Using USB Memories
General notes
• When no support files, the file list display nothing.
Notes on the Audio files
• This system can play the MP3/WMA/AAC/FLAC files
stored in the USB memory.
MP3 files:
• format: MPEG1/2 Audio layer3
• bit rate: 8k ~ 320kbps
• sampling frequency: 8/12/16/24/32/44.1/48KHz
• file extension: . mp3
WMA files:
• format: Windows media Audio standard L3
profile
• bit rate: 32 ~ 192KHz
• sampling frequency: 32/44.1/48 KHz
• file extension: .wma
AAC files
• format: Advanced Audio Coding LC-AAC,HE-
AAC
• sampling frequency: 32/44.1/48 KHz
• file extension: . m4a
FLAC files
• format: Free Lossless Audio Codec
• quantization bit rate: 16 or 24 bits
• sampling frequency: 44.1~192 KHz
• file extension: . flac
Notes on the folder structure
• The folder hierarchy must be within 8 hierarchical
levels. Otherwise, playback may be impossible.
• The maximum allowable number of folders is 65535
(including root directory and folders with no MP3
files, WMA AAC/FLAC file).
• The maximum allowable number of files in a folder
is 65535.
• You can store the MP3 files, WMA AAC/FLAC
together in a folder.
• The system may become slow if the files or folders
exceed the limitation above.
Notes on the Tag titles
The limitations on the Tag titles are same as those in
CD Player mode.
Select USB Audio Mode
Connect your USB memory with MP3 files, WMA AAC/
FLAC files to the USB connector. The system will
automatically detect the connected device, and the
[USB Audio] button on main menu will be enabled.
• When an USB memory is already connected
Touch [USB Audio] button to select the USB Audio
mode.
The system changes to the USB Audio mode and
starts playback from the previous position or from the
beginning.
This system has two USB connectors and can connect
two USB.
The volume label of the USB is indicated on the list of
USB root menu.
And you can select the desired USB by touching the
list.
If there is no information of the volume label of the
USB. This system indicate the USB as "My USB1",
"My USB2" on the list.
Note:
If you reconnect the same device that you disconnected
last, the system will play back where it left off.
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1. Option button
2. Play/Pause button
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NX404AU
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