About MP3/WMA/AAC, 15-EN | Alpine CDE-W233R, CDE-W235BT manual

Notes

• Press and hold for at least 2 seconds in the search mode to cancel. Or, the search mode is cancelled if no operation is performed for 10 seconds.

• Press in the search mode to return to the previous mode.

• When File Name Search is made during M.I.X. play, the M.I.X. play mode will be cancelled.

• Press  or  to select another Folder.

Select the desired file by turning the Rotary encoder. Press ENTER to play back the selected file.

Turn the Rotary encoder to select File Name Search mode, and then press ENTER.

During MP3/WMA/AAC playback, press ENTER to activate the search mode.

The “” indicator lights up.

3 Turn the Rotary encoder to select the desired folder.

4 Press and hold ENTER for at least 2 seconds to play back the first file in the selected folder.

Notes

• Press and hold for at least 2 seconds in the search mode to cancel. Or, the search mode is cancelled if no operation is performed for 10 seconds.

• To search for files in the Folder Name Search mode, press ENTER. Files in the folder may be searched.

• Press to exit Folder Name Search mode in step 3 in order to select File Name Search mode.

• The root folder is displayed as “ROOT”.

• When Folder Name Search is made during M.I.X. play, the M.I.X. play mode will be cancelled.

File Name Search mode

Turn the Rotary encoder to select Folder Name Search mode, and then press ENTER.

Folder/File Name Search (concerning MP3/WMA/AAC)

Folder and file names may be searched and displayed during playback.

Folder Name Search mode

1 During MP3/WMA/AAC playback, press ENTER to activate the search mode.

The “” indicator lights up.

About MP3/WMA/AAC

CAUTION

Except for private use, duplicating audio data (including MP3/ WMA/AAC 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.

What is MP3?

MP3, whose official name is “MPEG Audio Layer 3,” is a compression standard prescribed by the ISO, the International Standardization Organization 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.

Method for creating MP3/WMA/AAC files

Audio data is compressed using software with MP3/WMA/AAC codecs. For details on creating MP3/WMA/AAC files, refer to the user’s manual for that software.

MP3/WMA/AAC files that are playable on this device have the file extensions “mp3” / “wma” / “m4a”. Files with no extension cannot be played back (WMA ver. 7.1, 8 and 9 are supported). Protected files are not supported, neither are raw AAC files (using the “.aac” extension). 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
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
WMA
Sampling rates:	48 kHz, 44.1 kHz, 32 kHz
Bit rates:	48 - 192 kbps
AAC
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

This device may not play back correctly depending on sampling rates.