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Product Software Update
This product use software that can be updated through a USB flash
drive. Download the software from the Alpine website and update the
product using the USB flash drive.
Updating this product
Check the Alpine website for details on updating.
http://www.alpine-europe.com
Important information on the software
About the software licence of the product
The software installed in the product contains open-source software.
See the following Alpine website for details on the open source software.
http://www.alpine.com/e/oss/download
About the Supported Formats
• For the list of video formats supported from a USB flash drive, see
“About USB Video format” (page 60).
What is MP3?
MP3, whose official name is “MPEG Audio Layer 3,” is a compression
standard prescribed by the ISO, the International Standardisation
Organisation and MPEG which is a joint activity institution of the IEC.
MP3 files contain compressed audio data. MP3 encoding is capable
of compressing audio data at extremely high ratios, reducing the size
of music files to as much as one-tenth their original size. This is
achieved while still maintaining near CD quality. The MP3 format
realises such high compression ratios by eliminating the sounds that
are either inaudible to the human ear or masked by other sounds.
What is WMA?
WMA, or “Windows Media™ Audio,” is compressed audio data.
WMA is similar to MP3 audio data.
What is AAC?
AAC is the abbreviation for “Advanced Audio Coding,” and is a basic
format of audio compression used by MPEG2 or MPEG4.
What is FLAC?
FLAC (Free Lossless Audio Codec) is an audio file codec for lossless
compression, developed and offered as open source software.
Codecs with lossy compression forms, such as MP3 and AAC, reduce
part of the data to improve compression efficiency.
However, FLAC can reconstruct compressed data to be an identical
copy of the original data by performing lossless compression. The
compression ratio of FLAC is about 50%.
Method for creating MP3/WMA/AAC/FLAC (USB Flash drive) files
Audio data is compressed using software with MP3/WMA/AAC/FLAC
(USB Flash drive) codecs. For details on creating MP3/WMA/AAC/
FLAC (USB Flash drive) files, refer to the user’s manual for that
software.
MP3/WMA/AAC/FLAC (USB Flash drive) files that are playable on this
device have the file extensions.
MP3: “mp3”
WMA: “wma”
AAC: “m4a”
FLAC: ”flac”/”fla”
WMA is not supported for the following files, Windows Media Audio
Professional, Windows Media Audio 10 std or Windows Media Audio
10 Pro Lossless.
There are many different versions of the AAC format. Confirm that the
software being used conforms to the acceptable formats listed
above. It’s possible that the format may be unplayable even though
the extension is valid.
Playback of AAC files encoded by iTunes is supported.
Supported playback sampling rates and bit rates
MP3 (USB Flash drive)
WMA (USB Flash drive)
AAC (USB Flash drive)
FLAC (USB Flash drive)
This device may not play back correctly depending on sampling
rates.
Information
About MP3/WMA/AAC/FLAC
CAUTION
Except for private use, duplicating audio data (including
MP3/WMA/AAC/FLAC data) or distributing, transferring,
or copying it, whether for free or for a fee, without
permission of the copyright holder is strictly prohibited
by the Copyright Act and by international treaty.
Sampling rates:
48 kHz, 44.1 kHz, 32 kHz, 24 kHz, 22.05 kHz, 16 kHz,
12 kHz, 11.025 kHz, 8 kHz
Bit rates:
8 - 320 kbps
Sampling rates:
48 kHz, 44.1 kHz, 32 kHz, 22.05 kHz, 16 kHz,
11.025 kHz, 8 kHz
Bit rates:
48 - 320 kbps
Sampling rates:
48 kHz, 44.1 kHz, 32 kHz, 24 kHz, 22.05 kHz, 16 kHz,
12 kHz, 11.025 kHz, 8 kHz
Bit rates:
16 - 320 kbps
Sampling rates:
96kHz, 88.2kHz, 48kHz, 44.1kHz, 32kHz, 24kHz,
22.05kHz, 16kHz, 8kHz
Channel number: 1ch, 2ch
Summary of Contents for i902D
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