dolby pro logic
dolby pro logic II
stereo surround
mono surround
Some
Recently, Dolby Laboratories introduced a
There are two basic versions of Dolby Pro Logic II, one optimized for Dolby Sur-
Dolby Pro Logic II Movie is available either with or without the THX
Dolby Pro Logic II Music is not available with THX |
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was designed to correct | 77 |
surround sound performance from normal stereo recordings. |
The stereo surround mode has been carefully designed to extract real ambience from your recordings rather than synthesizing something artificial that might be quite alien to the music itself. The ambient cues found in the program material are then used to provide appropriate information for the center and rear speakers. The front Left and Right speakers are left unaffected by this mode, allowing you to hear unadulterated stereo imaging with the addition of a genuine sense of hall ambience. In general, it tends to be somewhat more subtle than Dolby Pro Logic II
Since this mode is based on the recordings themselves, it is normal to hear some variation in the degree of the effect. Extremely “dry” recordings which lack any significant ambience may not sound significantly different than when in surround off mode (e.g.,
The mono surround mode can provide a sense of spaciousness and size to monophonic program material such as some historical recordings and movie clas- sics such as Casablanca or The Wizard of Oz.
The mono surround mode makes no effort to “electronically reprocess to simulate stereo” (a process which almost always causes more harm than good). Instead, it uses sophisticated steering techniques to create a sense of space in what would otherwise be a largely dimensionless soundfield. It is particularly helpful when