Denon AVR-550SD Operations Instructions download pdf (Page 44)

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Dolby Virtual Speaker

Dolby Virtual Speaker technology uses proprietary technology of Dolby Laboratories to create a virtual surround

sound field using only two speakers for the front channels, allowing the user to experience sound as if surround

speakers were actually being used.

2 Features of Dolby Virtual Speaker sound

B Accurate surround sound field positioning

The virtual surround speakers are positioned at 105° to the left and 105° to the right.

B Multi-channel programs played according to the producer’s intentions

The sound of the different channels is played in the position set upon mixing. For example, sound set at

the rear left is heard from the rear left.

B Stereo programs played in surround

The Dolby Pro Logic

II circuit is used together with the Dolby Virtual Speaker circuitry to create a rich virtual

surround sound field with stereo programs as well.

B Selecting the listening mode

Two listening modes are provided: Reference and Wide.

Reference mode Wide mode

: 2 front channels

With the AVR-550SD, playback in the Dolby Virtual Speaker mode is possible with other speaker configurations

as well.

• 3 speakers (2 front channels + center) : Reference/Wide modes

• 4 speakers (2 front channels + 2 surround channels) : Wide mode

• 5 speakers (2 front channels + center + 2 surround channels) : Wide mode

Dolby Headphone

Dolby Headphone is a 3D sound technology developed jointly by Dolby Laboratories and Lake Technology of

Australia achieving surround sound with regular headphones.

Normally when using headphones all the sounds are sounded in the head, making it uncomfortable to listen with

headphones for long periods of time. Dolby Headphone simulates speaker playback in a room and positions the

sound sources to the front or the sides, outside of the head, achieving a powerful sound similar to that of a movie

theater or home theater. This technology is aimed mainly at multi-channel audio or video equipment including

Dolby Digital or Dolby Pro Logic Surround decoding functions and operates inside a high performance digital

signal processing chip (DSP).

The Dolby Headphone mode can be used not only with multi-channel sources but also with stereo programs.

: Virtual sound field created with the Dolby

Virtual Speaker mode

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Denon AVR-550SD Operations Instructions Page 44