WHAT IS A MINIDISC?

The disc is stored in a cartridge.You can handle it easily with- out worrying about dust, fingerprints, etc. However, dust en- tering the opening of the cartridge, dirt on the cartridge, warp- ing, etc. may cause malfunctions. Please note the following.

Handling the MiniDisc

Do not touch the disc directly!

Do not open the shutter or touch the disc directly. If the shutter is opened forcibly, it may break.

Disc

Shutter Cartridge

Adaptive TRansform Acoustic Coding [ATRAC]

The ATRAC (Adaptive TRansform Acoustic Coding) is a new technology that is designed to eliminate the information in sounds which you can not hear and to compress the remain- ing sound data so that the recording uses about 1/5 of the original sound information. Sound data is analyzed and filtered to take advantage of psycho acoustic masking. The acoustic quality of the sound is not impaired.

Types of discs

There are two types of discs: playback-only and recordable types.

Playback-only MiniDisc:

This type of MiniDisc is used for commercially available prerecorded music. This is the same kind of optical disc as CDs. Playback is performed using an optical pickup. (Re- cording and editing are not possible.)

Where not to store discs:

Do not store discs in places with high temperatures or hu- midity. Specifically, do not leave discs in places exposed to direct sunlight or in cars with doors and windows closed. Do not leave discs in places where sand can get into the car- tridge easily (e.g. beaches).

To prevent recorded discs from being erased accidentally

Slide the accidental erase prevention tab, located on the side of the disc, in the direction indicated by the arrow.

The disc will then be protected against accidental erasure.

To add a recording to such a disc, slide the accidental erase prevention tab back to its original position.

Tab

Protected against accidental erasure

What is a MiniDisc?

A MiniDisc is a 2-1/2" (64 mm) diameter disc which is stored in a cartridge. MiniDiscs are easy to handle, compared to CDs, because they are protected against dust and scratches.

Recording and playback use a digital system with a sound quality that is similar to that found on CDs.

MiniDiscs cannot twist or stretch like tapes. The quality of sound will not deteriorate. MiniDiscs are extremely durable.

Never disassemble MiniDiscs.

A Shutter will be used on only one side (back).

Recordable MiniDisc:

This is a "raw disc" on which recording can be performed. A magneto optical disc is used. Recordings are made us- ing a laser and magnetic field. Repeated recording is pos- sible.

Shutters will be used on both sides.

How to apply labels

When sticking a label on a MiniDisc cartridge, be sure to ob- serve the following. If a label is not affixed properly, a MiniDisc may become jammed in the unit such that it can not be removed.

Stick a label correctly to the specified area.

(Do not stick labels to areas other than the specified one.)

Do not stick one label upon another.

If a label is peeling off or starts to come

loose, replace it with a new one.

Shock Resistant Memory

During playback, approximately 10 seconds of information is stored in the semiconductor memory. Therefore, even when the pickup cannot read information for a second or two due to an external shock, the sound continues without interruption because the information stored in memory is output.

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Sharp MD-MX20 operation manual What is a MINIDISC?