Optimus STAV-3790 - Manual (Page 26)

26
Using Advanced Sound Options
Your receiver has three special sound options: Dolby Digital, Dolby Pro
Logic Surround, and DSP Effect. These special options enhance the
sound from a connected program source.
Notes:
• To get the full benefit from programs encoded with Dolby Sur-
round Sound, you need a stereo VCR or DVD/LD player.
• Dolby Surround does not operate correctly if the signal passes
through a graphic equalizer. If you connected an equalizer to the
TAPE 2 MONITOR jacks, do not select TAPE 2 MONITOR when you listen to
Dolby Surround signals.
To turn on Dolby Digital or Dolby Pro Logic Surround, press .
PRO LOGIC appears on the display. The receiver automatically judges
whether the received signal is Dolby Digital or Dolby Pro Logic Surround
and switches itself to the correct mode. When the receiver receives 5.1-
channel Dolby Digital signal,
DIGITAL lights on the display.
To turn on a DSP effect, press DSP MODE until the desired option appears
on the display along with SFC .
Dolby Digital
Dolby Digital is a compression format that records the sound of six
channels (front L/R, center, surround L/R, and subwoofer). Since the
subwoofer has a smaller frequency range, the term 5.1-channel is used.
All channels’ sounds are digitally compressed using a method called
AC-3. When playing back, the masking and digital filtering technology
yields the best sound quality. The LFE (low frequency effect) technique
adds strong bass sounds. See “Low Frequency Effect Attenuator Set-
ting” on Page 18 to set the LFE level. When the source signal has an
LFE channel,
LFE lights on the display and the indicator next to it lights
when the receiver actually receives LFE signal.
Dolby Pro Logic Surround
Dolby Pro Logic Surround puts you in the middle of the action. The cen-
ter- and rear-channel speakers add incredible realism by directing the
sound to the appropriate speakers.
DSP Effect
You can choose one of five DSP effects — HALL 1 , HALL 2 , JAZZ ,
DANCE , THEATER 1 , or THEATER 2 . Hall 1 simulates a large concert
hall, Hall 2 simulates a concert hall with stone walls, and both are best
suited for classical music. Jazz provides the acoustic effects generally
heard in jazz clubs. Dance gives the effect of a discotheque. Both the-
ater modes provide the effect of a movie theater. THEATER 1 sounds
like a large movie theater. THEATER 2 seems like a smaller theater. Try
each setting to find the best effect for your programs.
To change the DSP effect level, press DSP MODE (on the receiver or remote
control), then hold down – EFFECT + (on the remote) to change the effect
level. The effect can vary depending on the source program.
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