Specifications

Audio Technology ReferenceA-1

AAudio Technology Reference

This chapter describes and defines the various technologies used in your Creative Inspire 5.1 Digital 5700.

DTS Digital Surround

is a discrete 5.1 channel digital audio format that delivers five discrete full-range

channels (left, center, right, left surround and right surround) plus a seperate Low Frequency Effects (LFE)

channel.

Dolby Digital

Dolby Digital (also referred to as AC-3) delivers five discrete full-range channels (left, center, right, left

surround and right surround) plus a separate Low Frequency Effects (LFE) channel.Many soundtracks on

the latest generation laser discs, DVDs and High Definition Television (HDTV), are encoded with Dolby

Digital technology. When a 5.1-channel Dolby Digital program source is playing, such as from a Creative

PC-DVD player, DVD player or game console, the Dolby Digital indicator light lights up automatically.

Note: Not all media in a DVD will be 5.1-channel encoded. On many DVDs, only the main movie program

will be available in 5.1-channel sound. Other supporting chapters (like a “Director’s Commentary” section)

may be in stereo or mono. For these programs, the Dolby Digital indicator may not light up, even though

the sound will be properly reproduced by the Creative Inspire 5.1 Digital 5700.

Dolby Pro Logic

Dolby Surround is an earlier surround sound standard that is decoded with a Pro Logic processor. The Pro

Logic steering circuitry derives separate center and rear channels from encoded stereo program sources.

Pro Logic processing provides a convincing movie soundfield when the material is specifically encoded

for Dolby Surround. Most older stereo movie soundtracks will only be encoded for Dolby Surround, even

though the program source may be a DVD’s digital output. Most DVDs containing Dolby Surround

program material will cause both the Dolby Digital and Dolby Pro Logic lights to illuminate. Creative

Inspire 5.1 Digital 5700 will decode these digitally transferred Dolby Surround programs through the

digital Pro Logic decoder automatically.

CD-ROMs and CDs with Dolby Surround encoding will feature the Dolby Surround logo at the beginning

of the program or on the packaging.

If you are using an analog input, select Line In. Then select Pro Logic processing using the DOLBY PRO

LOGIC ON/OFF button. When Dolby Pro Logic is selected, CMSS is turned off. To turn on CMSS again,

turn off Dolby Pro Logic first.

If using Digital DIN, Optical or Coaxial input, ensure that the corresponding digital input is selected. Then

select Pro Logic processing using the DOLBY PRO LOGIC ON/OFF button. When Dolby Pro Logic is

selected, CMSS is turned off. To turn on CMSS again, turn off Dolby Pro Logic first.

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