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Surround
The AVR-5805 is equipped with a digital signal processing circuit that lets you play program sources in the surround mode to achieve the same
sense of presence as in a movie theater.
[1] Dolby Surround
qDolby Digital
Dolby Digital is the multi-channel digital signal format developed by Dolby Laboratories.
Dolby Digital consists of up to “5.1” channels - front left, front right, center, surround left, surround right, and an additional channel
exclusively reserved for additional deep bass sound effects (the Low Frequency Effects – LFE – channel, also called the “.1” channel,
containing bass frequencies of up to 120 Hz).
Unlike the analog Dolby Pro Logic format, Dolby Digital’s main channels can all contain full range sound information, from the lowest bass,
up to the highest frequencies – 22 kHz. The signals within each channel are distinct from the others, allowing pinpoint sound imaging, and
Dolby Digital offers tremendous dynamic range from the most powerful sound effects to the quietest, softest sounds, free from noise and
distortion.
2Dolby Digital and Dolby Pro Logic
Comparison of home surround systems
No. recorded channels (elements)
No. playback channels
Playback channels (max.)
Audio processing
High frequency playback limit of surround
channel
Dolby Digital
5.1 ch
5.1 ch
L, R, C, SL, SR, SW
Digital discrete processing Dolby Digital (AC-3) encoding/decoding
20 kHz
Dolby Pro Logic
2 ch
4 ch
L, R, C, S (SW - recommended)
Analog matrix processing Dolby Surround
7 kHz
2Dolby Digital compatible media and playback methods
Marks indicating Dolby Digital compatibility: .
The following are general examples. Also refer to the player’s operating instructions.
Media
DVD
Others
(satellite broadcasts, CATV, etc.)
Dolby Digital output jacks
Optical or coaxial digital output
(same as for PCM)
1
Optical or coaxial digital output
(same as for PCM)
Playback method (reference page)
Set the input mode to “AUTO”.
(Page 126)
Set the input mode to “AUTO”.
(Page 126)
1Some DVD digital outputs have the function of switching the Dolby Digital signal output method between “bit stream” and “(convert to)
PCM”. When playing in Dolby Digital surround on the AVR-5805, switch the DVD player’s output mode to “bit stream”. In some cases
players are equipped with both “bit stream + PCM” and “PCM only” digital outputs. In this case connect the “bit stream + PCM” jacks
to the AVR-5805.
wDolby Pro Logic IIx
•Dolby Pro Logic IIx furthers the matrix decoding technology of Dolby Pro Logic II to decode audio signals recorded on two channels into
up to 7.1 playback channels, including the surround back channel. Dolby Pro Logic IIx also allows 5.1-channel sources to be played in up
to 7.1 channels.
The mode can be selected according to the source. The Music mode is best suited for playing music, the Cinema mode for playing
movies, and the Game mode for playing games. The Game mode can only be used with 2-channel audio sources.
