Kenwood DM-9090 instruction manual MD system

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MD system

The Mini Disc system has the features as summarized in the following.

1Like CD (Compact Disc), playback can be started from any position. (Random access)

2 It uses a disc with a diameter of 64 mm that is accommodated in a cartridge.

3 Two types of discs can be used. (playback only discs, recordable / playable discs).

4 Up to 74 minutes of recording or playback is possible using high-efficiency coding technology. 5 Countermeasure against vibration is taken using semiconductor memory chip.

DM-9090 (En)

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Playback-only Mini Disc

This type of MD can be used only for playback, and is used by the commercially-available mu- sic MD software packages. The playback-only MD is an optical disc like the Compact Disc (CD). The signals are recorded as the presence or absence of small pits and read out by an optical, non-contact pickup.

Recordable Mini Disc

This MD is a magneto-optical disc which can be recorded by magnetic field modulation. To record signals, laser light is irradiated from the bottom side of the magneto-optical disc and magnetic field is applied from the upper side of it.

Sound-skip prevention memory

During playback, this unit always stores signals in memory temporarily to prevent sound from being skipped in case of vibration. As a result, even when the data from the optical pickup is interrupted due to vibration, etc., the music will not be interrupted because the memory holds the data for several seconds.

During normal

Mini Disc

playback

 

 

Several sec. of data

 

Digital memory

The sound data for several

In case of vibration

seconds is always stored

 

during playback.

 

Reproduced sound

When the readout from disc is interrupted momentarily due to vibration or shock, the reproduced sound from the memory will not be interrupted.

Reproduced sound

High-efficiency coding technology “ATRAC” (Adaptive TRansform Acoustic Coding)

The Mini Disc has only a half the size of the Compact Disc but provides the same recording time. This is made possible by ATRAC*, a newly developed high-efficiency coding technology.

The ATRAC compresses the music data to about 1/5 the amount of data which would be obtained with conventional technology, by cutting off the sound components which do not pose problem in audition even when they are not present. This has made it possible to record or play up to 74 minutes.

Sound does not af- fect the sensitivity of ears

Sensitivity of ears

Lowest and highest frequencies are not audible unless the sound has a certain level of volume.

Lowest frequencies

Highest frequencies

Small sound near large sound

A small sound is not audible to human ears if it is produced at the same time as a large sound. (Masking effect)

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9 3 6

Monaural recording

This unit can record a longer period of sound in monaural (monaural long-play mode). In this mode, the recording time of the disc is about double that

in the stereo mode.

 

The Mini Disc recorded in the monaural mode cannot be played with equipment which is not compatible with monaural playback.

^

D.R.I.V.E. (Dynamic Resolution Intensive Vector Enhancement) system

This unit incorporates the KENWOOD-original “20-bit REC D.R.I.V.E.” system so that, not to mention the CD, analog sources such as the tuner and analog disk turntable can also be recorded with high-quality 20-bit recording.

The digital inputs include both optical and coaxial input jacks so that high-quality recording is possible from any digital equipment.

1The reproducibility of small signals is improved drastically for an excellent reproduction of fine reverberations of music. The excellence is also remarkable in the feeling of stability, presence, attack sound and bass reproduction.

2The D.R.I.V.E. system maintains the correlation between the musical components of the input and output signals and does not cause any sound degradation from the principle.

MONITOR function

This unit can be used as a 24-bit D/A converter by setting the MONITOR key.

Refer to “MONITOR key”. £

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Contents DM-9090 Safety precautions Introduction Before applying powerUnits are designed for operation as follows Factory fitted moulded mains plugContents Accessories Special featureImportant Safeguards Power OFF Installation position Safety Precautions Handling of Mini DiscInformation that you should know Dust countermeasureMemory backup Maintenance CleaningReference notes Beware of condensation Be especially careful in the following conditionsMD system Digital input / output jacks Optical System connectionsAbout the system control operations About the system control connectionsStandby mode Listening through headphonesNames and functions of parts Display / Main unitDescription of main unit keys Model RC-M0702 Infrared ray system Remote control unitLoading batteries Operation of remote control unitOperation 1Remove the cover.2Insert batteries.3Close the coverPlayback of Mini Disc Disc recorded in monaural modePlaying tracks in order from track No Before playing a MDPress the Title Search key PreparationSelect the desired title T L EEnter the track mode 1Enter the track modeRandom playback Select the desired track numberSearching in a track Skipping tracksTo pause playback To stop playbackProgramming Initiate the program modeProgramming tracks in a desired order Select track numbers in the order you want to play themChecking the order of tracks To add a track to the programTo clear tracks from the program Clearing tracks from the endTo repeat only the programmed tracks Repeated playbackTo stop repeated playback To repeat the entire discRecording-related keys AUTO/MANUAL key Monitor keySelect before starting recording Selecting the setting adjustment mode REC Mode keyREC LEVEL? Auto TIME?When Auto TIME? is displayed When D.REC LEVEL? is selectedWhen Auto LEVEL? is displayed When Fade TIME? is displayedRecording Analog input 1Adjust the settings if requiredAnalog recording Select Analog or MonoSelect Auto or Manual Adjust the recording level. Main unit onlyStart recording After recording, eject the Mini DiscDigital recording Recording Digital inputSelect one of Digital 1, 2 To fade in and fade out the musicAdjust the digital source recording level UnlockTrack being played Track Erase Digital recording and Scms Synchro recording with CD playbackSelecting the editing function type EditingReordering tracks by moving them Erasing desired tracks Quick EraseSelect Move Moving the track being played Track MoveV E Select the move destinationImage of track moving To cancel the editing results Edit CancelExecute the track reordering operation Eject the Mini Disc1Select Q.MOVE Moving several tracks at a time Quick Move2Select the track numbers to be moved End the selection of the track numbers to be movedP Ç? / 0 0 Image of track insertion2 / Ç? 8 / Ç? ESelect Divide Dividing the track being played Track Divide2Preview the result V I D E +Image of preview Execute the track divide operationImage of track division 2Select the track to be combined 5 +5 + Combined tracks are decreased automaticallyExecute the track combine operation Image of track combinationSelect Erase Erasing the track being played Track EraseA S E Confirm that the track has been erasedImage of track erasure R a S E 1To erase all MD tracks2To erase desired tracks 5 ? a B CS C Error When Disc Error is displayedImage of track deleting Quick Erase Erasing desired tracksEditing titles About preset titlesTotal number of title characters Characters usable in title editingInput the title L ML M 3To change or erase a title N E O O D a B CN W O O D Scrolling the display Title editing function keysExecute title change or deletion S CCopying the CD text CD text editing1Transmit the CD text into the MD recorder Single C D t e x tThis key allows to switch the mode of time display Changing the displayed contentsTime Display key Fade keyTimer playback, timer recording Timer operationsSymptoms related to MD standard Operation to resetSymptom Cause Case of difficultyDisplayed Message Meaning Action Symptom Cause Remedy Other symptomsSpecifications Memo For your records
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