Yamaha DSP-A970 - Manual (Page 45)

43
English
● DIR. ENHANCEMENT (Directional Enhancement)
This circuit emphasizes the position of sound. If this circuit is
activated, the unity constituent of the input left and right channels
(those signals which are common to the left and right channels) will
be output from the center speaker, and the disparity constituent of
the left and right signals (the difference between the left and right
channels) will be output from the surround speakers.
Because the unity constituent signal determines localization,
precise localization is obtained even though a listener is left or right
of the ideal center listening position.
The primary sound field around the screen is obtained according
to processing based on left, center and right speakers as the sound
source. Also, with the processing of the surround sound source
based on the disparity constituent (which includes most of the
indirectional sound constituent), sound diffusion to the rear speakers
is obtained. Therefore, directional enhancement is an especially
effective processing option for vocal or operas.
With monaural sound sources, almost all sounds are output from
the center speaker instead of the left and right main speakers.
Selectable levels:
OFF/MIN/MID/MAX
● DOLBY PRO LOGIC (for MOVIE THEATER only)
By adding the Dolby Pro Logic Decoder to the DSP effect, the full
presence of a 70 mm film theater is reproduced without deteriorating
the channel separation.
With monaural sound sources, almost all sounds are output from
the center speaker instead of the left and right main speakers.
Selectivity:
ON/OFF
● DELAY
Adjusts the delay between the direct sounds (at the main left,
center and main right channels) and the effect sounds (at the front
effect and rear effect channels). The larger the value, the later the
effect sounds are generated.
Control Range:
15 – 30 milliseconds