Sound field programs, Audio information, Itu-R

GLOSSARY

Sound field programs

■CINEMA DSP

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.

■SILENT CINEMA

YAMAHA has developed 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.

■Virtual CINEMA DSP

YAMAHA has developed a Virtual CINEMA DSP algorithm that allows you to enjoy DSP sound field surround effects even without any surround speakers by using virtual surround speakers.

It is even possible to enjoy Virtual CINEMA DSP using a minimal two-speaker system that does not include a center speaker.

Audio information

■ITU-R

ITU-R is the radio communication sector of the ITU (International Telecommunication Union). ITU-R recommends a standard speaker placement which is used in many critical listening rooms, especially for mastering purposes.

■LFE 0.1 channel

This channel is for the reproduction of low bass signals. The frequency range for this channel is 20 Hz to 120 Hz. This channel is counted as 0.1 because it only enforces a low frequency range compared to the full-range reproduced by the other 5/6 channels in Dolby Digital or DTS 5.1/6.1-channel systems.

■PCM (Linear PCM)

Linear PCM is a signal format under which an analog audio signal is digitized, recorded and transmitted without using any compression. This is used as a method of recording CDs and DVD audio. The PCM system uses a technique for sampling the size of the analog signal per very small unit of time. Standing for “pulse code modulation”, the analog signal is encoded as pulses and then modulated for recording.

■Sampling frequency and number of

quantized bits

When digitizing an analog audio signal, the number of times the signal is sampled per second is called the sampling frequency, while the degree of fineness when converting the sound level into a numeric value is called the number of quantized bits.

The range of rates that can be played back is determined based on the sampling rate, while the dynamic range representing the sound level difference is determined by the number of quantized bits. In principle, the higher the sampling frequency, the wider the range of frequencies that can be played back, and the higher the number of quantized bits, the more finely the sound level can be reproduced.

RX-V657 specifications

The Yamaha RX-V657 is a versatile and robust AV receiver, designed to cater to both audiophiles and casual listeners alike. Released in the mid-2000s, this model quickly became popular due to its impressive feature set and solid performance, making it an excellent choice for home theater enthusiasts.

One of the standout features of the RX-V657 is its ability to deliver 6.1 channel surround sound. This receiver supports various audio formats, including Dolby Digital EX and DTS-ES, allowing it to immerse listeners in multi-dimensional soundscapes. Users can enjoy their favorite movies, music, and games with enhanced depth and clarity, ensuring an engaging audio experience.

The RX-V657 is equipped with Yamaha's proprietary YPAO (Yamaha Parametric room Acoustic Optimizer) technology. This feature automatically measures the acoustics of your room and adjusts the speaker settings accordingly, optimizing the sound output based on the specific environment. This ensures that you achieve the best possible sound quality, regardless of your room's shape or furnishings.

Another notable aspect of the RX-V657 is its connectivity options. The receiver comes with multiple HDMI inputs, allowing for easy integration with modern devices such as Blu-ray players, gaming consoles, and streaming devices. It also features legacy connections like component and composite video inputs, making it compatible with older equipment as well. Additionally, the inclusion of an FM/AM tuner ensures that users can enjoy traditional radio broadcasts.

The RX-V657 includes a variety of audio processing features, such as Yamaha's cinema DSP. This technology recreates the acoustic characteristics of famous concert halls and cinema environments, enhancing the listening experience for music and movie fans alike. The receiver supports multiple sound fields, giving users the flexibility to choose the optimal setting for their content.

In terms of power, the RX-V657 delivers a solid performance with 100 watts per channel. This wattage ensures that it can drive a wide range of speakers, providing sufficient power for both small and larger home theater setups. The RX-V657 also incorporates a high dynamic power capability, which improves performance during demanding audio passages.

The design of the RX-V657 reflects Yamaha’s commitment to quality, featuring a sleek, modern aesthetic with a user-friendly front panel. The intuitive layout of controls, along with a well-organized display, enhances the overall user experience, making it easy to navigate through various settings and features.

In conclusion, the Yamaha RX-V657 is a feature-rich AV receiver that combines advanced audio technologies with practical connectivity options. It caters to the needs of both casual listeners and dedicated audio enthusiasts, making it a valuable addition to any home theater system. Its blend of performance, versatility, and ease of use positions it as a highly regarded model in Yamaha's lineup.