Audio Technology Reference; Dolby Digital; Dolby Pro Logic Ii; Dts Digital Surround - Creative Inspire GD580 User Manual

English.book Page 1 Friday, August 1, 2003 12:04 PM
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Audio Technology Reference

This chapter describes and defines the various technologies used in your Creative Inspire GD580.

Dolby Digital

Dolby Digital 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 DVDs
and High Definition Televisions (HDTVs) are encoded with Dolby Digital technology. The Dolby Digital
indicator lights up automatically when a 5.1 Dolby Digital program source (such as a DVD player or game
console) is playing.
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 Creative Inspire GD580.

Dolby Pro Logic II

Dolby Pro Logic II is an advanced matrix decoder that creates five full-bandwidth output channels (Left,
Center, Right, Left Surround, Right Surround) from any stereo program material, whether or not it has been
specifically Dolby Surround encoded. This is done using an advanced, high-purity matrix surround
decoder that extracts the spatial properties of the original recording without adding any new sounds or tonal
colourations.
Movie Mode
The Movie mode is for use with stereo television shows and all programs encoded in Dolby Surround. The
result is enhanced directional sound coming from all the speakers that simulates discrete 5.1-channel
sound.
Music Mode
The Music mode is for use with any stereo music recordings, and provides a wide and deep audio
environment.

DTS Digital Surround

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 separate Low frequency Effects (LFE)
channel.
A-1 Audio Technology Reference