Antares JVP user manual

							JVP UserÕs Manual31 General Controls
The setting is deleted from the menu. 
Processing Delay Display
The Processing Delay Display shows the amount of time in seconds that
JVP will delay a trackÕs sound output. Delay is introduced by the Compres-
sor and the De-esser to enhance their level detection capabilities. Tracks can
be slipped to the left by the amount shown in the Processing Delay Display
to resynchronize their output with other non-processed tracks. 
Note: The delay value displayed does not reßect additional delay intro-
duced by the TDM system when the output is printed to a track. 
						

							Introducing JVP
32JVP UserÕs Manual 
						

							JVP UserÕs Manual33
CHAPTER 3Using JVP
This chapter contains the details of using JVPÕs controls and a short how-to
section on each of the tools. 
The De-esser
The de-esser Õs controls are accessed by pressing the Display Button under
the word ÒDe-esserÓ in JVPÕs display. The settings on the de-essers controls
are still active even if they are not currently displayed. 
						

							Using JVP
34JVP UserÕs Manual
The Controls
Gain Reduction Meter
The Gain Reduction Meter displays the amount of compression of the sig-
nal. If the frequency and threshold controls are set properly, the meter will
display little gain reduction during vowel sounds and soft consonants, and
substantial gain reduction during sibilants.
Threshold Control/Level Meter
The threshold control includes a level meter which displays the output of
the de-esser Õs high pass Þlter. The control knob is adjusted by dragging it
with the mouse. The effect of the change is heard while the knob is being
dragged.
Frequency Control
The de-esser can be viewed as a compressor which is keyed by the output
of a high pass Þlter. When the Þlter passes a signal larger than the compres-
sor Õs threshold, the compressor clamps down on the signal. Since sibilants
are primarily broad band noise above 5 KHz, the Þlter is designed to pass
these signals and attenuate low frequency signals as much as possible.
The Þlter used in JVPÕs de-esser is a two pole, 12 dB/octave high pass
design which effectively distinguishes between sibilants and other vocal
sounds. You can hear what the compressor input sounds like by using the
high pass Þlter option in the Parametric EQ.
The range of the control is from 10 Hz to 20,000 Hz. The control knob is
adjusted by dragging it with the mouse. The effect of moving the slider is
heard during the drag. Fine adjustments can be made to the frequency
value by pressing  before beginning the drag. The resolution is
increased by a factor of ten. 
						

							JVP UserÕs Manual35 The De-esser
Ratio Control
This control adjusts the compression ratio of the de-esser Õs compressor ele-
ment. The range of the control is from 1.0 to 1 to 99 to 1. The control is
adjusted by dragging the knob with the mouse.
Attack Time  Control
The attack time control adjusts the speed with which the compressor ele-
ment responds to peaks in the signal coming from the high pass Þlter. The
range of the control is from 0 milliseconds to 100 milliseconds. The control
is adjusted by dragging the knob with the mouse.
Release Time  Control
The release time control adjusts the time it takes for the compressor ele-
mentÕs gain to increase 6 dB after the input level drops below the threshold.
The range of the control is from 0 milliseconds to 4,999 milliseconds. The
control is adjusted by dragging the knob with the mouse.
Using The De-esser With ProTools
JVPÕs de-esser is very easy to use. The following instructions will guide you
through a typical workßow.
4. Start a ProTools session containing vocal tracks.
5. Select ÒShow Inserts ViewÓ from the Display menu.
6. Check ÒLoop Selected RegionÓ in the Options menu.
7. Solo a vocal track and select a short phrase that contains sibilants.
8. Choose ÒJVPÓ from the insert menu of the vocal track.
9. Click on the Tool Display Button for the De-esser.
10. Click on the De-esserÕs Bypass button to enable it.
11. Start playback.
Notice how the sibilants increase the signal level displayed in the 
Threshold Level Meter. 
						

							Using JVP
36JVP UserÕs Manual
12. Adjust the Frequency control to maximize the difference between the peaks 
caused by the sibilants and the other sounds in the track.
Frequency settings around 13,000 Hz work best in most cases.
13. Adjust the Threshold control so that it is just above the general level of the 
non-sibilant sounds in the track.
Notice that the amount of gain reduction is maximized during sibilant 
sounds.
14. Adjust the compression ratio, attack and release times as desired.
Increasing the compression ratio, increases the amount of gain reduction 
and therefor the amount of de-essing.
15. Stop playback.
Other tools can now be added to the processing chain by clicking off their
Tool Bypass Buttons. 
The Compressor/Gate
JVPÕs compressor/gate uses powerful new DSP technologies originally
developed for the Multiband Dynamic Tool. While it doesnÕt have the ßexi-
bility of the MDT, the compressor/gate offers you all the controls found on 
						

							JVP UserÕs Manual37 The Compressor/Gate
hardware compressors with the added bonus of 24 bit audio quality plus a
Threshold Level Meter to take the guess work out of setting the gate and
compressor thresholds.
The Controls
Gain Reduction Meter
The Gain Reduction Meter displays the amount of compression of the sig-
nal. When the input signal is above the compression threshold or below the
gate threshold, the Gain Reduction Meter will display the amount of com-
pression being applied. The range of the meter is 30 dB.
Threshold Controls/Level Meter
The threshold controls include a level meter which displays the actual level
of the input signal that the compressor/gate uses for gain calculations. This
level is inßuenced by the attack and release times. This can be demon-
strated by observing that the apparent input level increases as the release
time is increased.
The control sliders are adjusted by dragging the knob.
Gate Ratio Control
This control adjusts the expansion ratio of the downward expanding gate.
The range of the control is from 1:1.0 to 1:99. The control is adjusted by
dragging the knob with the mouse.
Compressor Ratio Control
This control adjusts the compression ratio of the compressor. The range of
the control is from 1.0:1 to 99:1. The control is adjusted by dragging the
knob with the mouse. 
						

							Using JVP
38JVP UserÕs Manual
Attack Time  Control
The attack time control adjusts the speed with which the compressor/gate
responds to peaks in the input signal. The range of the control is from 0 mil-
liseconds to 100 milliseconds. The control is adjusted by dragging the knob
with the mouse.
Application Note: While using the compressor and the de-esser simulta-
neously, make sure that the attack time of the compressor is long enough to
not interact with de-esser.
Release Time  Control
The release time control adjusts the time it takes for the compressor Õs gain
to return to normal after the input level drops below the threshold. The
range of the control is from 0 milliseconds to 5,000 milliseconds. The control
is adjusted by dragging the knob with the mouse.
Knee Control
The knee control adjusts the sharpness of the transitions between uncom-
pressed and compressed signals. As a signal increases in level through the
threshold, the compressor will begin to apply gain reduction. With a soft
knee (1.00), that change in gain will be gradual and therefor less noticeable.
The range of the control is from 0.00 (hard knee) to 1.00 (soft knee. The con-
trol is adjusted by dragging the knob with the mouse.
Using The  Compressor
1. Start a ProTools session containing vocal tracks.
2. Select ÒShow Inserts ViewÓ from the Display menu.
3. Check ÒLoop Selected RegionÓ in the Options menu.
4. Select a short phrase that contains large amplitude peaks.
5. Choose ÒJVPÓ from the insert menu.
6. Click on the Tool Bypass Button for the Compressor.
7. Click on the Tool Display Button for the Compressor.
8. Start playback. 
						

							JVP UserÕs Manual39 The Compressor/Gate
Notice the signal level displayed in the Threshold Level Meter. Deter-
mine the average level and the peak level.
9. Adjust the Attack Time and Release Time to best track the changes in the input 
signal.
For most spoken material, attack times between 1 and 10 mSec work 
well. Release times around 50 - 100 mSec. work well for material 
recorded in a dry, quiet environment.
10. Adjust the Compressor Threshold control so that it is just above the average level 
of the track.
In most cases, compressing the peaks is all that is necessary. As the 
threshold is brought down, observe the gain reduction meter displaying 
the amount of compression in use.
11. Adjust the compression ratio, attack time and release time to Þne tune the sound.
Increasing the compression ratio, increases the amount of gain reduction 
and therefor the amount of compression.
12. Adjust the Gate Threshold and Gate Ratio to gate out breath sounds, background 
noise, etc. in between the spoken passages.
The intensity of the gating effect can be adjusted using the Gate Ratio 
control.
13. Stop playback. 
						

							Using JVP
40JVP UserÕs Manual
The Parametric EQ
JVPÕs parametric EQ uses powerful new algorithms optimized for the 56000
chip used in every Digidesign DSP card, giving a true 140 dB dynamic
range and minimal distortion.
The EQ has three Þlter sections. Two of the sections can be conÞgured as
different Þlter types giving you a wide range of possibilities for controlling
timbre and eliminating noise. 
When the Parametric EQ is not bypassed, all three Þlters are operating con-
tinuously. The Þlters are designed to be completely Òout of the circuitÓ
when the Gain Control is set to 0 dB.
The Controls
Filter Selector Buttons
The Filter Selector buttons operate as radio buttons. That is, only one can be
selected at any time. The left Þlter section can be a low pass, a low shelf, or a
peak/notch Þlter. The right Þlter section can be a high pass, a high shelf, or
a peak/notch Þlter. The center Þlter section is always a peak/notch Þlter.