Glossary; Audio Information; Copyright And Logo Marks; Notes About Handling Compact Discs - Yamaha MCR-640 Owner's Manual

NOTES ABOUT HANDLING COMPACT DISCS

NOTES ABOUT HANDLING COMPACT DISCS
■ Handling compact discs
• Always handle with care so that the playing surface is
not scratched. Do not warp discs.
• To keep clean the playing surface, wipe with a clean,
dry cloth. Do not use any type of disc cleaner, spray, or
any other chemical-based liquid.

Audio information

■ MP3 (MPEG Audio Layer-3)
One of the audio compression methods used by MPEG. It
employs the irreversible compression method, which
achieves a high compression rate by thinning out the data
of hardly audible part to the human ears. It is said to be
capable of compressing the data quantity by about 1/11
(128 kbps) while maintaining a similar audio quality to
music CD.
■ PCM (Pulse Code Modulation)
A signal that is changed to digital format without
compression. A CD is recorded with 16-bit sound at
44.1 kHz. This signal also has a type called Packed PCM
(PPCM) that can be compressed without any loss of data.
■ Sampling frequency
The number of sampling (process for digitalizing analog
signals) per second. In principle, the higher the sampling
rate, the wider the frequency range that can be played
back, and the higher the quantized bit rate, the finer the
sound that can be reproduced.
■ Track
A CD can be divided into a number of segments (tracks).
Each division is called a track number.
■ WMA (Windows Media Audio)
An audio compression method developed by Microsoft
Corporation. It employs the irreversible compression
method, which achieves a high compression rate by
thinning out the data of hardly audible part to the human
ears. It is said to be capable of compressing the data
quantity by about 1/22 (64 kbps) while maintaining a
similar audio quality to music CD.
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• Do not wipe with a circular motion; wipe straight
outward from the center.
• Use a soft-tipped pen when writing on the label side of
the disc.
• When a disc is not being used, remove it from this unit
and store in an appropriate case.
• Do not expose discs to direct sunlight, high
temperature or high humidity for a long time.

GLOSSARY

Copyright and logo marks

MPEG Layer-3 audio decoding technology licensed from
Fraunhofer IIS and Thomson Multimedia.
iPod™
"iPod" is a trademark of Apple Inc., registered in the U.S. and
other countries.
"Made for iPod" means that an electronic accessory has been
designed to connect specifically to iPod and has been certified by
the developer to meet Apple performance standards.
Apple is not responsible for the operation of this device or its
compliance with safety and regulatory standards.