JVC RX-DV31 manual Creating Realistic Sound Fields, Dolby surround Dolby Pro Logic

Creating Realistic Sound Fields

You can use the following Surround modes to reproduce a realistic sound field:

7Dolby surround

•Dolby Pro Logic II

7Digital multi-channel surround

•Dolby Digital

•DTS Digital Surround

7DAP (Digital Acoustic Processor) modes

7All Channel Stereo

■Dolby surround

Dolby Pro Logic II*

Dolby Pro Logic II is a playback format to decode into 5.1- channel from all 2-channel sources—stereo sources and Dolby surround encoded sources.

Matrix-based encoding/decoding method for Dolby Pro Logic

IImakes no limitation for the cutoff frequency of the surround treble and enables stereo surround sound compared to conventional Dolby Pro Logic.

•You cannot select Dolby Pro Logic II when playing back

DVD AUDIO.

DTS Digital Surround**

Used to reproduce multi-channel sound tracks of software encoded with DTS Digital Surround ().

•To use software encoded with DTS Digital Surround, connect the source component using the digital terminal on the rear of this unit. (See page 11.)

DTS Digital Surround is another discrete multi-channel digital audio format available on CD, LD, and DVD software. Compared to Dolby Digital, audio compression ratio is relatively low. This fact allows DTS Digital Surround format to add breadth and depth to the reproduced sounds. As a result, DTS Digital Surround features natural, solid and clear sound.

Note:

•Dolby Digital or DTS software can be roughly grouped into two categories—multi-channel (up to 5.1-channel) and 2-channel software. To enjoy surround sounds while playing Dolby Digital 2- channel or DTS software, you can use Dolby Pro Logic II.

Typical multi-channel (5.1-channel) reproduction

English

Dolby Pro Logic II enables you to reproduce spacious sound from original sound without adding any new sounds and tonal colorations.

Dolby Pro Logic II has two modes—Movie mode and Music mode:

Pro Logic II Movie (PLII MOVIE)—suitable for reproduction of Dolby Surround encoded sources bearing the mark

DOLBY SURROUND and stereo television sources. You can enjoy a sound field very close to the one created with discrete 5.1- channel sounds.

Pro Logic II Music (PLII MUSIC)—suitable for reproduction of any 2-channel stereo music sources. You can enjoy wide and deep sound by using this mode.

•When Dolby Pro Logic II is activated, the PL indicator lights up on the display.

Center

speaker

Left front speaker

Left surround

speaker

Subwoofer Right front speaker

Right surround

speaker

■Digital multi-channel (5.1 channel) surround

Dolby Digital*

Used to reproduce multi-channel sound tracks of the software encoded with Dolby Digital (D I G I T A L ).

•To enjoy the software encoded with Dolby Digital, connect the source component using the digital terminal on the rear of this unit. (See page 11.)

Dolby Digital 5.1-channelencoding method (so-called discrete multi-channel digital audio format) records and digitally compresses the left front channel, right front channel, center channel, left surround channel, right surround channel, and LFE channel signals.

Since each channel is completely independent from the other channel signals to avoid interference, you can obtain much better sound quality with many stereo and surround effects.

■DAP (Digital Acoustic Processor) modes

DAP modes have been designed to create important acoustic surround elements.

•You cannot select DAP modes when playing back DVD AUDIO.

The sound heard in a live club, dance club, hall or pavilion consists of direct sound and indirect sound—early reflections and reflections from behind. Direct sounds reach the listener directly without any reflection. On the other hand, indirect sounds are delayed by the distances of the ceiling and walls (see the diagram on the next page).

These indirect sounds are important elements of the acoustic surround effects. The DAP mode can reproduce a realistic sound field by adding these indirect sounds.

* Manufactured under license from Dolby Laboratories. “Dolby”, “Pro	**“DTS” and “DTS Digital Surround” are registered trademarks of
Logic”, and the double-D symbol are trademarks of Dolby	Digital Theater Systems, Inc.
Laboratories.

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