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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 ADV-M71, 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