Yamaha AVX-S30 owner manual Glossary

Glossary

■Air Surround

Front surround sound system which is developed by Yamaha enables the surround sound field using six speaker units built in two satellite speakers. In comparison with traditional front surround technologies, the Air Surround system enables a wide range of natural surround sound field.

■Channel (ch)

A channel is an audio type that has been divided based on range and other characteristics.

Ex. 5.1 channel

•Front speakers, Left (1ch), Right (1ch)

•Center speaker (1 ch)

•Surround speakers, Left (1ch), Right (1ch)

•Subwoofer (1 ch x 0.1* = 0.1 ch)

*In contrast to a full 1-channel band, a component designed to enhance low frequency sound for added effect.

■CINEMA DSP

(Digital Sound Field Processor)

Since the Dolby Surround and DTS systems were originally designed for use in movie theaters, their effect is best felt in a theater having many speakers and designed for acoustic effects. Since home conditions, such as room size, wall material, number of speakers, and so on, can differ so widely, it’s inevitable that there are differences in the sound heard as well. Based on a wealth of actually measured data, YAMAHA CINEMA DSP uses YAMAHA original sound field technology to combine Dolby Pro Logic, Dolby Digital and DTS systems to provide the visual and audio experience of movie theater in the listening room of your own home.

■Dolby Digital

Digital surround sound system which is developed by Dolby Laboratories provides completely independent multi-channel audio. With 3 front channels (left, center, and right) and 2 surround stereo channels, Dolby Digital provides five full-range audio channels. With an additional channel especially for bass effects (called LFE, or low frequency effect), the system has a total of 5.1-channels (LFE is counted as 0.1 channel). By using 2-channel stereo for the surround speakers, more accurate moving sound effects and surround sound environment are possible than with Dolby Surround.

ADDITIONAL INFORMATION

■Dolby Pro Logic II

It is an improved matrix decoding technology that
provides better spatiality and directionality on Dolby
Surround programmed material; provides a convincing
three-dimensional sound field on conventional stereo
music recordings; and is ideally suited to bring the
surround experience to automotive sound. While
conventional surround programming is fully compatible
with Dolby Surround Pro Logic II decoders, soundtracks
will be able to be encoded specifically to take full
advantage of Pro Logic II playback, including separate left		ADDITIONAL
Digital surround sound system developed by Digital
and right surround channels. (Such material is also
compatible with conventional Pro Logic decoders).
■ DTS (Digital Theater System)
Theater Systems, Inc., which provides 5.1 channel audio.		INFORMATION
With an abundance of audio data, it is able to provide
authentic-sounding effects.
■ DVS (Dolby Virtual Speaker)
Front surround sound system which is developed by
Dolby Laboratories provides 5.1-channel audio.
■ 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, while DVD recording is anywhere from 16 bits at 48
kHz to 24 bits at 192 kHz, which makes it a higher quality
sound than CD. 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.
■	“SILENT CINEMA”

“SILENT CINEMA” was developed by YAMAHA as a natural, realistic sound effect DSP algorithm for headphones. Parameters for headphones have been set for each sound field so that accurate representations of all the sound field programs can be enjoyed on headphones.

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