JBL Synthesis Sdp3 Manual

JBL SynthesisPCM Effects and Parameters
42
LOW FREQ  WIDTH allows you to apply low-frequency spatial correc-
tion to the signal. Positive values of LOW FREQ Width indicate that the
difference signal (L-R) has additional energy below 500Hz, while the
sum (L+R) has correspondingly less. Negative settings of LOW FREQ
WIDTH can compensate for recordings with too much of this property.
This control can add needed spaciousness and warmth to classical
recordings made with coincident or near-coincident...

SDP-3 Digital Surround Processor/ControllerPCM Effects and Parameters
43
ROLLOFF mimics the absorption of the air in the hall and, typically,
should begin with a low frequency to simulate large spaces.
SIDE LEVEL controls the volume level of the side speakers. Although
we have selected a default value, the correct setting will vary with each
recording, the room, and your personal taste.
SIDE ROLLOFF provides a high frequency cutoff for the side speakers.
The optimal setting for this control will vary...

JBL SynthesisPCM Effects and Parameters
44
SURROUND ROLLOFF allows the high frequencies of the rear
channels to be attenuated with the same detection circuitry as that
described for the Soundstage control. The attenuation is quite attractive
on many music and broadcast sources that were not mixed for surround.
When a surround source is detected, these filters are removed, so the
rear speakers can reproduce surround events with full bandwidth. This
control should be set high enough to give presence and...

SDP-3 Digital Surround Processor/ControllerPCM Effects and Parameters
45
AC-3 Effects are compatible with Dolby Digital input signals. Any AC-3-
capable software and/or source components should be labeled with a
Dolby Digital badge, similar to the one on the SDP-3 front panel.
AC-3 Status Display
In the AC-3 effects, an AC-3 Status Display is available in the parameter
menu with the following information.
MATRIX ENCODED: YES indicates a 2.0 Dolby Digital input is matrix
encoded; No indicates it is not....

JBL SynthesisAC-3 Effects and Parameters
46
Parameter Initial Value Range
AC-3 STATUS  (display only — not user adjustable)
COMPRESSION OFF OFF, ON, AUTO
RE-EQUALIZER OFF ON, OFF
BASS ENHANCE OFF ON, OFF
REAR DLY OFFSET 15ms 0-20ms
SIDE LEVEL +0dB -5dB to +5dB
REAR  LEVEL +0dB -5dB to +5dB
LFE MIX LEVEL +0.0dB -10dB to 0dB
SUBWOOFER LVL +0dB -10dB to +10dB
CUSTOM/TRIGGER ENABLE ENABLE, DISABLE
5.1 Music
This Effect enhances playback of Dolby Digital music recordings, or
Dolby Digital film soundtracks...

SDP-3 Digital Surround Processor/ControllerAC-3 Effects and Parameters
47
5.1 Logic 7
5.1 Logic 7 combines all the features of Dolby Digital AC-3 with
enhancements by JBL Synthesis and LucasFilm. This effect uses Logic
7 matrix technology to enhance the steering between the side speakers
and the rear speakers, so sounds intended to come from behind the
listener actually do come from behind. This effect also includes the
adaptive decorrelation and re-equalizer features of 5.1 THX.
5.1 Logic 7 provides the...

JBL SynthesisAC-3 Effects and Parameters
48
AC-3 2.0 Effects
The AC-3 2.0 Effects will be chosen by the SDP-3 whenever an AC-3
5.1 Effect is selected and the Program Content of the signal is 2/0 (see
page 45 for more detail). The following matrix shows which 2.0 effect
will play when its corresponding 5.1 effect is selected manually or
programmed as the AC-3 FX for the selected input (see page 17 for
more detail).
2.0 2-Channel
When this effect is chosen, playback from an AC-3 encoded 2/0 signal
will be...

SDP-3 Digital Surround Processor/ControllerAC-3 Effects and Parameters
49
2.0 Rock/Pop
2.0 Rock/Pop is a surround effect developed specifically for music
listening with AC-3 encoded 2/0 signals. It makes full use of additional
speakers placed at the center, sides and rear of the room and provides
a slight degree of steering for the front channels.
2.0 Logic 7
2.0 Logic 7 works just like the Logic 7 PCM effect but for AC-3 encoded
2/0 signals. This mode is ideal for film sound. For more detail on Logic
7,...

JBL SynthesisAC-3 Effects and Parameters
50
2.0 Pro Logic
2.0 Pro Logic provides Dolby Pro Logic surround decoding designed for
Dolby Surround encoded movies, music or television programs or  games.
This effect works just like the Pro Logic PCM effect but for AC-3 encoded
2/0 signals.
2.0 THX Cinema
2.0 THX Cinema works just like the THX Cinema PCM effect but for AC-
3 encoded 2/0 signals.  For more detail on the THX Cinema effect, see
the description on page 39.
AC-3 Effect Parameters
5 SPEAKER ENHANCE...

SDP-3 Digital Surround Processor/ControllerAC-3 Effects and Parameters
51
BASS ENHANCE derives stereo bass to provide low frequencies that
are noticeably less localizable and more spacious in the playback room.
Note that results will vary depending on room acoustics and the low
frequency capacity of the surround speakers.
CENTER DLY SAMPLES adjusts the time offset of the center channel.
The appropriate value is +0 unless you know that the center channel is
not properly timed, as well as the amount by...