JVC XM-448BK manual Atrac Adaptive TRansform Acoustic Coding, Sound skip guard memory

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ATRAC (Adaptive TRansform Acoustic Coding)

(dB)

+20

High

0

-20

Ear sens.

-40

-60

Low

20	50	100	500	1k	5k	10k	15k
			Audio				(Hz)
Low			Audio			High
Low						High

freq.

The MD (Mini Disc) has half the size of the CD but can record data for the same period of time. This has been made possible by the newly developed ATRAC (Adaptive TRansform Acoustic Coding), which compresses data by cutting the audio components that are inaudible to the human sense of audition. This technology reduces the recorded data to about 1/5 the original data quantity and enables recording/playback of data for up to 74 minutes.

Sound skip guard memory

During normal playback

stop

During vibration

The sound skip guard memory stores some data of the played track so that the played audio does not skip due to vibration during MD (Mini Disc) playback.

In case the optical laser cannot read disc signal due to vibration, the actually reproduced audio is not interrupted because the data stored in the guard memory is available.

UTOC (User Table Of Contents)

UTOC Contents

			1st tune...
	Music data		2nd tune...
	Music data		3rd tune...
			3rd tune...

The recordable MD (Mini Disc) contains the recording of UTOC (User Table Of Contents) in addition to music data itself. The UTOC includes the information on the positions the tracks are recorded, markings between tracks and order of tracks, so tracks can be searched quickly by referring to it. The editing operations consist of altering the UTOC contents and the actual music data does not need to be re-recorded.

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Contents XM-448BK For U.S.A Important cautions WelcomeFor safe use, observe the following Table of Contents Parts Index STOP/CANCEL buttonFront panel DisplayPower button Buttons on the Inside Panel Play Mode buttons Remote control unitInside panel Display buttonsSupplied accessories Setting up the SystemRemote control batteries Operating the remote control unitConnection Signal cable connectionsExample Amplifier/Tuner Audio pin cordsPower On Turning the Power On and OffPower Off AC power cord connectionContinuous playback PlaybackTo select a track Using headphonesSearch play To switch the display information Using the display modeProgram playback To change the brightness of the displaySelect Program Play mode. Main unit Remote control unitSelect desired track numbers to be programmed. Main unit Random playback To cancel repeat playback To cancel Random Play mode In Stop mode Main unitRepeat playback To repeat random playbackRecording operation RecordingThings to know before recording To stop recording Play the source to be recordedTo display the remaining recording time To adjust the analog input levelTrack marking MD editing functions Editing FunctionsCombining editing functions When using the remote control unitAssigning titles Dividing a track Divide Press SET on the main unit or on the remote control unitPlay a track to be divided Joining tracks Join Select a track to be joined with the previous track Press Enter on the main unit or on the remote control unitDecrements by Select a track number to be moved, then press SET Moving a track MoveErasing a track Erase Press Edit on the main unit or on the remote control unitTo select Erase Blinks Blinks BlinksPress 0 on the main unit or on the cover panel the remote Select a track number to be erased, then press SETControl unit to eject the MD Erasing all tracks in an MD ALL Erase Assigning the disc title and track titles To assign a title using the buttons on the main unitLoad a recorded MD Press Title Press SETPress Enter Available symbolsPress 0 to eject the MD To make a correction or change the titleInput the disc or track title Input the track title name To assign a track title during playback or recordingLinked Operation of the Other Optional Components Compu Connection with receiver or amplifier Text Compu LinkCD player Connection to CD player or CD changerScms Serial Copy Management System Rule on Digital Copying1st generation 2nd generation Role of the cartridge About MD Mini DiscTwo disc types Playback-only MDAtrac Adaptive TRansform Acoustic Coding Utoc User Table Of ContentsSound skip guard memory Handling MDs MD handling precautionsMessages Description Treatment MD MessagesMD Restrictions Symptom CauseSymptom Cause Treatment TroubleshootingHOW to Locate Your JVC Service Center Limited Warranty AUDIO-1 Digital Specifications