Yamaha RX-V2400 User Manual

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Dolby Surround uses a 4 channel analog recording system 
to reproduce realistic and dynamic sound effects: 2 front 
left and right channels (stereo), a center channel for dialog 
(monaural), and a surround channel for special sound 
effects (monaural). The surround channel reproduces 
sound within a narrow frequency range.
Dolby Surround is widely used with nearly all video tapes 
and laser discs, and in many TV and cable broadcasts as 
well. The Dolby Pro Logic decoder built into this unit 
employs a digital signal processing system that 
automatically stabilizes the volume on each channel to 
enhance moving sound effects and directionality.

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Dolby Digital is a digital surround sound system that gives 
you completely independent multi-channel audio. With 3 
front channels (left, center, and right), and 2 surround 
stereo channels, Dolby Digital provides 5 full-range audio 
channels. With an additional channel especially for bass 
effects, called LFE (low frequency effect), the system has 
a total of 5.1 channels (LFE is counted as 0.1 channel). By 
using 2-channel stereo for the surround speakers, more 
accurate moving sound effects and surround sound 
environment are possible than with Dolby Surround. The 
wide dynamic range (from maximum to minimum 
volume) reproduced by the 5 full-range channels and the 
precise sound orientation generated using digital sound 
processing provide listeners with previously unheard of 
excitement and realism.
With this unit, any sound environment from monaural up 
to a 5.1-channel configuration can be freely selected for 
your enjoyment.
Dolby Digital EX creates 6 full-bandwidth output 
channels from 5.1-channel sources. This is done using a 
matrix decoder that derives 3 surround channels from the 
2 in the original recording. For the best results, Dolby 
Digital EX should be used with movie sound tracks 
recorded with Dolby Digital Surround EX. With this 
additional channel, you can experience more dynamic and 
realistic moving sound especially with scenes with 
"flyover" and "fly-around" effects.

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Dolby Pro Logic II is an improved technique used to 
decode vast numbers of existing Dolby Surround software. 
This new technology enables a discrete 5-channel 
playback with 2 front left and right channels, 1 center 
channel, and 2 surround left and right channels (instead of 
only 1 surround channel for conventional Pro Logic 
technology). The Music and Game modes are also 
available for 2-channel sources in addition to the movie 
mode.

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Dolby Pro Logic IIx is a new technology enabling discrete 
7.1-channel playback from 2-channel or multi-channel 
sources. There is a Music mode for music, a Movie mode 
for movies and a Game mode for games.

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DTS digital surround was developed to replace the analog 
soundtracks of movies with a 6-channel digital sound 
track, and is now rapidly gaining popularity in movie 
theaters around the world. Digital Theater Systems Inc. 
has developed a home theater system so that you can enjoy 
the depth of sound and natural spatial representation of 
DTS digital surround in your home. This system produces 
practically distortion-free 6-channel sound (technically, a 
left, right and center channels, 2 surround channels, plus 
an LFE 0.1 channel as a subwoofer, for a total of 5.1 
channels).
The unit incorporates DTS-ES decoder that enables 6.1- 
channel reproduction by adding the surround back channel 
to existing 5.1-channel format.

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Neo:6 decodes the conventional 2-channel sources for 6 
channel playback by the specific decoder. It enables 
playback with the full-range channels with higher 
separation just like digital discrete signal playback. Two 
modes are available; “Music mode” for playing music 
sources and “Cinema mode” for movies.

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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 a Dolby Digital or 
DTS 5.1/6.1 channel systems.

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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.

00_RX-V2400U_EN.book  Page 86  Friday, October 10, 2003  10:54 AM