GLOSSARY

Audio formats

■Dolby Digital

Dolby Digital is a digital surround sound system that gives you completely independent multi-channel audio. With 3 front channels (left, center, and right), and 2 surround stereo channels, Dolby Digital provides 5 full-range audio channels. With an additional channel especially for bass effects, called LFE (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. The wide dynamic range (from maximum to minimum volume) reproduced by the 5 full-range channels and the precise sound orientation generated using digital sound processing provide listeners with previously unheard of excitement and realism.

With this unit, any sound environment from monaural up to a 5.1-channel configuration can be freely selected for your enjoyment.

■Dolby Digital EX

Dolby Digital EX creates 6 full-bandwidth output channels from 5.1-channel sources. This is done using a matrix decoder that derives 3 surround channels from the 2 in the original recording. For the best results, Dolby Digital EX should be used with movie sound tracks recorded with Dolby Digital Surround EX. With this additional channel, you can experience more dynamic and realistic moving sound especially with scenes with “flyover” and “fly-around” effects.

■Dolby Pro Logic II

Dolby Pro Logic II is an improved technique used to decode vast numbers of existing Dolby Surround software. This new technology enables a discrete 5-channel playback with 2 front left and right channels, 1 center channel, and 2 surround left and right channels (instead of only 1 surround channel for conventional Pro Logic technology). Music and Game modes are also available for 2-channel sources in addition to the Movie mode.

■Dolby Pro Logic IIx

Dolby Pro Logic IIx is a new technology enabling discrete multi-channel playback from 2-channel or multi-channel sources. There is a Music mode for music, a Movie mode for movies (for 2-channel sources only) and a Game mode for games.

■Dolby Surround

Dolby Surround uses a 4 channel analog recording system to reproduce realistic and dynamic sound effects: 2 front left and right channels (stereo), a center channel for dialog (monaural), and a surround channel for special sound effects (monaural). The surround channel reproduces sound within a narrow frequency range.

Dolby Surround is widely used with nearly all video tapes and laser discs, and in many TV and cable broadcasts as well. The Dolby Pro Logic decoder built into this unit employs a digital signal processing system that automatically stabilizes the volume on each channel to enhance moving sound effects and directionality.

■DTS 96/24

DTS 96/24 offers an unprecedented level of audio quality for multi-channel sound on DVD-Video, and is fully backward-compatible with all DTS decoders. “96” refers to a 96 kHz sampling rate (compared to the typical 48 kHz sampling rate). “24” refers to 24-bit word length. DTS 96/ 24 offers sound quality transparent to the original 96/24 master, and 96/24 5.1-channel sound with full-quality full- motion video for music programs and motion picture soundtracks on DVD-video.

■DTS (Digital Theater Systems)

Digital Surround

DTS digital surround was developed to replace the analog soundtracks of movies with a 6-channel digital sound track, and is now rapidly gaining popularity in movie theaters around the world. Digital Theater Systems Inc. has developed a home theater system so that you can enjoy the depth of sound and natural spatial representation of DTS digital surround in your home. This system produces practically distortion-free 6-channel sound (technically, a left, right and center channels, 2 surround channels, plus an LFE 0.1 channel as a subwoofer, for a total of 5.1- channels). The unit incorporates a DTS-ES decoder that enables 6.1-channel reproduction by adding the surround back channel to existing 5.1-channel format.

■Neo:6

Neo:6 decodes the conventional 2-channel sources for 6 channel playback by the specific decoder. It enables playback with the full-range channels with higher separation just like digital discrete signal playback. Two modes are available; “Music mode” for playing music sources and “Cinema mode” for movies.

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Yamaha RX-V457 owner manual Glossary, Audio formats
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RX-V457 specifications

The Yamaha RX-V457 is a versatile and powerful AV receiver that was crafted to enhance the home audio experience. Designed with both quality and functionality in mind, this receiver appeals to both audiophiles and casual listeners looking for an impressive sound system.

One of the standout features of the RX-V457 is its robust audio performance. It supports a 6.1-channel surround sound system, providing immersive audio quality that brings movies, music, and games to life. With a total output of 630 watts, users can expect dynamic sound that fills the room, whether it’s the subtle sound of a whisper or the booming action of a blockbuster movie.

This AV receiver also comes equipped with Yamaha’s Digital ToP-ART (Total Purity Audio Reproduction Technology). This technology minimizes signal interference, which results in clearer audio and better overall sound quality. Additionally, the RX-V457 employs the YPAO (Yamaha Parametric Room Acoustic Optimizer) feature. This automatic calibration system analyzes the room’s acoustics and adjusts the receiver’s settings for optimal performance, ensuring that every listener experiences the best sound quality, regardless of where they are seated.

Connectivity options are plentiful with the RX-V457. It boasts a range of audio and video inputs, including multiple HDMI inputs, component video, and composite video connections. This extensive capability allows users to connect various devices such as DVD players, gaming consoles, and streaming devices seamlessly. Furthermore, the receiver supports both analog and digital audio signals, making it an adaptable choice for diverse audio sources.

In terms of user interface, the Yamaha RX-V457 is designed for ease of use. The straightforward remote control and on-screen display make navigating through options simple, allowing users to adjust settings or switch inputs without hassle.

The aesthetics of the RX-V457 is sleek and unobtrusive, fitting comfortably into a variety of home entertainment setups. The build quality is robust, ensuring longevity and reliability for years to come. Overall, the Yamaha RX-V457 delivers a balanced combination of advanced technology, user-friendly features, and high-fidelity sound, making it an excellent choice for anyone looking to elevate their audio experience at home.
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