Additional Information
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•Other types of audio:
These signals are designed to recreate a 360° sound field
using three to five speakers.
In this case the speakers should surround the listener from
all sides to create a uniform sound field from 360°. Ideally
the surround speakers should function as “point” sound
sources in the same way as the front speakers.
These two types of sources thus have different properties, and
different speaker settings, particularly for the surround
speakers, are required in order to achieve the ideal sound.
The AVR-4806’s surround speaker selection function makes
it possible to change the settings according to the
combination of surround speakers being used and the
surrounding environment in order to achieve the ideal
surround sound for all sources. This means that you can
connect a pair of bipolar or dipolar surround speakers
(mounted on either side of the prime listening position), as
well as a separate pair of direct radiating (monopolar)
speakers placed at the rear corners of the listening room.
Optimum surround sound for different
sources
There are currently various types of multi-channel signals
(signals or formats with more than two channels).
2Types of multi-channel signals
Dolby Digital (including Surround EX), DTS (including
Surround ES), DVD-Audio, and Super Audio CD.
Note on the above: MUSE 3.1 and MPEG multi-channel
audio are not available to North American consumers –
same is true for Dolby’s AAC.
“Source” here does not refer to the type of signal (format) but
the recorded content. Sources can be divided into two major
categories.
2Types of sources
•Movie audio:
Signals created to be played in movie theaters. In general
sound is recorded to be played in movie theaters equipped
with multiple surround speakers, regardless of the format
(Dolby Digital, DTS, etc.).
Multiple surround speakers
Movie theater sound field
Listening room
sound field
In this case it is important to achieve the same sense of
expansion as in a movie theater with the surround
channels.
To do so, in some cases the number of surround speakers
is increased (to four or eight) or speakers with bipolar or
dipolar properties are used.
SL : Surround L channel
SR : Surround R channel
SB : Surround B (back) channel
