Antares JVP user manual

							JVP UserÕs Manual41 The Parametric EQ
Low Pass Filter
This Þlter type allows energy below the cutoff frequency to pass. JVP uses a
12 dB/octave Þlter here to optimize for hiss reduction, psychoacoustic mix-
ing effects, and so on.
Low Shelf Filter
The low shelf Þlter can be used as a tone control in full mixes or to enhance
the ÒbodyÓ of solo vocal and instrumental tracks.
Peak/Notch Filter
The Peak/Notch Filter type is generally useful in coloring voice and instru-
ment tracks in a variety of ways. It is often the most used Þlter type in para-
metric EQ applications.
High Shelf Filter
The high shelf Þlter type is used as a tone control in full mixes and to add
ÒairÓ to voice tracks.
High Pass Filter
High pass Þlters allow energy above the cutoff frequency to pass. JVP uses
a 12 dB/octave Þlter here to optimize for rumble reduction, sub-sonic Þlter-
ing, and so on.
Frequency Control
The frequency control is adjusted by dragging the knob. The range of the
control is from 10 Hz to 20,000 Hz. The effect of moving the slider is heard
during the drag. Fine adjustments can be made to the frequency value by
pressing  before beginning to drag the knob.
Gain Control
The gain control adjusts the amount of boost or cut given to the signal by
the Þlter section. The range of the control is from +24 dB to -24 dB, adjust-
able in 1 dB increments. The gain control is adjusted by dragging the knob
with the mouse. When the control is set at 0 dB gain, the Þlter section is
effectively disabled. To zero the control, press  and click in the area
of the slot in which it travels.  
						

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Bandwidth Control
This control is enabled only when a Þlter section is in peak/notch mode.
The bandwidth control adjusts the width of the peak/notch Þlter. The range
of the control is from 0.1 octaves to 4.0 octaves, adjustable in 0.1 octave
increments. The control is adjusted by dragging as above.
Using The  EQ
The operation of JVPÕs parametric EQ is similar to all other digital EQs. It is
distinguished by its 24 bit dynamic range and unusual range of adjustment.
The following are some tips to consider when using the parametric EQ.
Avoiding Distortion
If you hear clipping in the signal, but the output level meter doesnÕt indi-
cate it, youÕve probably caused internal clipping of the 24 bit data stream.
This condition will almost always occur when the input signal is near full
scale and positive gain is added by the Þlter sections. The remedy is to
lower the input level using the input level control. Since JVPÕs Þlters are
applied in order from left to right, putting a -24 dB Þlter before a +24 bit Þl-
ter at the same frequency will avoid clipping.
Zero Phase EQ
All Þlters, both digital and analog, introduce phase shifts or delays when
they Þlter the signal. Phase shifts are timing delays which can effect the
transient material in musical signals. These effects are heard as the blurring
of stereo images and smearing of percussive transients. To eliminate phase
shifts while applying EQ, follow the steps below.
1. EQ the selected data at 1/2 the gain you intend in the Þnal output.
2. Reverse the selected data in time.
3. EQ the data again using exactly the same settings as before.
4. Reverse the data again to return it to its original state. 
						

							JVP UserÕs Manual43 The Parametric EQ
The effect of the EQ will be as expected except that any timing errors intro-
duced by phase shift will be canceled.
80 Hz square wave
80 Hz square wave Þltered twice 
with an 80 Hz, 12 dB/octave high 
pass Þlter.
Net EQ: ~6 dB down @ 80Hz
80 Hz square wave Þltered twice 
with an 80 Hz, 12 dB/octave high 
pass Þlter using the zero phase 
method.
Net EQ: ~6 dB down @ 80Hz 
						

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44JVP UserÕs Manual
The Delay FX
JVPÕs Delay FX tool is unusual because it provides more control than the
delays normally found in hardware reverb and delay units. In addition to
having six individually adjustable taps, the Delay FX tool allows you to use
negative gain and adjustable comb Þltering to create a wide variety of musi-
cal results. Its controls are familiar and easy to use, so creating complex
delay effects from scratch can be done by ear.
The Controls
FX Mix Control
The FX Mix control adjusts the balance between the input signal and the
signal generated by the delay. The range of the control is from 0 to 100, zero
being 100% input signal. The control is adjusted by dragging the knob. 
For a stereo to stereo JVP, the delay effects are added into the stereo mix
using the Pan Controls mentioned below. In a mono to stereo JVP, the delay
effects are added via the Pan Controls to the mono signal to produce a ste-
reo output. In a mono to mono JVP, the delay effects are added directly to
the mono input signal and produce a mono output. 
						

							JVP UserÕs Manual45 The Delay FX
Feedback Delay Control
This control adjusts the amount of delay used in the comb Þlter. The range
of the control is from 0 milliseconds to 371.3 milliseconds. Large delay val-
ues will give an echo-like effect. Small delay values will thicken the sound
or, if the Feedback Gain value is high, create a pitched effect.
Feedback Gain Control
The Feedback Gain control adjusts the amount of signal that is fed back
through the comb Þlter. The range of the control is from -99% to +99%. Neg-
ative gain settings reverse the polarity of the signal being fed back. The con-
trol is adjusted by dragging the knob.
When the control is set at 0 dB gain, the feedback section is effectively dis-
abled. To zero the control, press  and click in the area of the slot in
which it travels. 
Low Pass Filter Control
This control adjusts the amount of high frequencies that are used in the
feedback signal. The range of the control is from 10 Hz to 20,000 Hz.
Delay Tap Display Buttons
Because of limited screen turf, only two delay taps are displayed at one
time. Pressing on a Delay Tap Display Button will cause the associated taps
to appear on the Delay FX page. Only one pair of taps can be displayed at a
given time.
Delay Time  Control
This control adjusts the amount of delay the signal receives through the
associated tap. The range of the control is from 0 milliseconds to 371.4 milli-
seconds.  
						

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Gain Control
The delay tapÕs gain control adjusts the amount of signal that is contributed
to the delay FX mix by the tap. The range of the control is from -99% to
+99%. The control is adjusted by dragging the knob.
When the control is set at 0 dB gain, the delay tap is effectively disabled. 
Pan Control
In a stereo to stereo or mono to stereo JVP, the output of each delay tap can
be panned to any location between the Left and Right channels. The control
is adjusted by dragging the slider with the mouse or by pressing on or
about the slot in which it travels. The effect of moving the slider is heard
during the drag. This control is disabled when processing a single channel
or mono.
Using The  Delay
The diagram above shows the signal ßows inside JVPÕs Delay FX module.
Notice that the two stereo channels are summed before being input into the
LPF
DELAYP
A
NAv
DELAYP
A
NAv
DELAYP
A
NAv
DELAYP
A
NAv
DELAYP
A
NAv
DELAYP
A
NAv
FB DELAYAv
SSAv
Av
AvS
S
S
S
S
S
S
SS
S
S
S
S
S
L OUT
R OUT L IN
R INFX MIX
2
FX MIX
FX MIX FB GAIN
Comb Þlter 
						

							JVP UserÕs Manual47 The Delay FX
delay. The signal then ßows through the comb Þlter. The function of this
element is to ÒechoÓ the sound. This echoing causes periodic notches in the
frequency response of the output. Hence the name comb Þlter. Long feed-
back delay times will actually sound like real echoes.
The signal then goes through one or many of the delay taps. Each tap can be
individually adjusted for delay and gain. Using a negative gain setting,
reverses the polarity of the delayed signal, which makes for complex inter-
actions in the frequency domain when using short delay times. Finally, the
delayed signals are panned and summed to the outputs.
Using JVPÕs Delay FX module is easy because the controls are familiar,
readily accessible, and can be adjusted by ear. Here are a few tips which will
prove useful when using JVPÕs Delay FX.
No Output?
At least one of the taps must be Òturned onÓ for the delayed signal to be
heard. (Refer to the diagram.) Remember that the taps are turned off when
their gain is zero.
Adding Pre-Delay
The output of the comb Þlter section can be delayed by using a tap. The
delay time of the tap is equal to the Òpre-delayÓ time you want.
Simulating ÒEarly  ReßectionsÓ
The six delay taps can be conÞgured to simulate early reßections by keep-
ing the delay times under 50 milliseconds. Sound travels at about one foot
per millisecond. If you are standing twenty feet away from a wall, the
sound you make will echo back to you 2 times 20 milliseconds or 40 milli-
seconds later. Using the delay times of the taps, you can design the early
reßections of any rectangular room from a closet to a cathedral! 
						

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							JVP UserÕs Manual49 Index
Index
A
Adding Pre-Delay 47
attack time 18
Attack Time Control 35
Avoiding Distortion 42
C
Comb Þlter 25
Compression 13
Compression ratio 14
Compressor
Gain Reduction Meter 37
Knee Control 38
Compressor Ratio Control 37
Compressor/Gate 36
D
De-Esser 20
De-esser 33
Delay
Comb Þlter 47
Pan Control 46
Delay FX 44
Delay Tap Display Buttons 45
Delay Time Control 45
Delete SettingsÉ 30
Dynamic Expansion 15
Dynamic range 13
E
Early Reßections 47
Echo 47
effect of changing attack time 19
effect of changing release time 19
EQ
Bandwidth Control 42
Frequency Control 41
Gain Control 41
F
Feedback Delay Control 45
Feedback Gain Control 45
Filter Selector Buttons 40
Filter Types 22
Frequency Control 34
FX Mix Control 44 
						

							50JVP UserÕs Manual
G
Gain reduction 15
Gain Reduction Indicator 29
Gain Reduction Meter 34
Gate Ratio Control 37
Gating 15
H
High pass 22
How To Use This Manual 9
I
Installing The JVP 10
K
Knee 17
L
Level Meter 34
Level meters 28
Low Pass 22
M
mixing 13
Multi-Tap Delay 25
N
Negative gain on delay taps 26
No Output? 47
O
Owner Registration 10
P
Parametric EQ 40
Peak/notch 23
Pre-Delay 47
R
Ratio 14
Ratio Control 35
release time 19
Release Time Control 35
Resolution of digital Þlters 21
S
Save Settings AsÉ 29
Setting Menu 29
Shelving Filters 24
Sibilants 20