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SDP-2 Effects
JBL
Jazz
Jazz Parameters
The Jazz Effect generates the appropriate early reflections for stereo simu-
lation of many different intimate spaces, and sends the reflections to the
front, side and rear speakers.
Parameter
Initial Value
HALL SIZE
9 Meiers
4-17 Meters
LIVENESS
4
046
ROLLOFF
11,.8kHz
453Hz-20.0kHz
SPEECH DETECT
ON/OFF
CENTER LEVEL
0-15
SUBWOOFER LVL.
+00B
-10 to +10dB
EFFECT LEVEL
30 to +05dB
CUSTOM/TRIGGER
HALL SIZE allows you to select room sizes of lengths ranging from 4-17
meters.
LIVENESS adjusts the amount of recirculation within the effect. Higher
values mimic more reflective surfaces in the simulated space and increase
the amount of time it takes the sound to decay. At very high values, the
decay is audibly less smooth than in the Church and Cathedral Effects,
which are more effective at simulating very live spaces.
ROLLOFF mimics the absorption of the air in the hall and, typically, should
begin with a low frequency to simulate large spaces.
SPEECH DETECT activates a circuit that distinguishes monaural speech
from other inputs. Essentially, this control turns down the effect to make
speech clearer. Whenever stereo signals are present, the right and left input
channels are used independently as inputs to the ambience synthesis. If
there is a strong monaural speaking voice present at the same time, this
component of the input to the Jazz effect is reduced while the stereo
component is increased.
If the input signal is pure monaural speech the reverb is almost entirely
attenuated. SPEECH DETECT is a real benefit to some popular music
(where spoken voice, such as rap, occurs along with the music), stereo
television and early stereo movies. Any stereo material which was not
carefully mixed for Surround is a good candidate for playing through the
Jazz Effect with speech detect on.
CENTER LEVEL adjusts the output level from the center speaker.
SUBWOOFER LVL boosts or cuts the subwoofer output level. Although the
normal subwoofer level is set during the calibration procedure, with some
recordings it may be desirable to increase or decrease this deep bass level.
EFFECT LEVEL adjusts the loudness of the side and rear speakers. When
there are no side speakers, it adjusts the amount of ambient signal mixed
into the main loudspeakers.
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