ART levelar ユーザーガイド
threshold (adding
more compression to a signal). Turning this
control clockwise raises the threshold.
Setting the threshold control is dependent on the input signal.
The output from a guitar might be -20dB to -10dB, where the
level from an insert on a console might be -5dB to +10dB. The
easiest way to set the threshold control is to start with the control
fully clockwise. Slowly turn the control counter-clockwise (lower-
ing threshold) until you see the threshold LED light. Now adjust
the control (either lower or higher) until you have the amount of
compression you desire.
The output from a guitar might be -20dB to -10dB, where the
level from an insert on a console might be -5dB to +10dB. The
easiest way to set the threshold control is to start with the control
fully clockwise. Slowly turn the control counter-clockwise (lower-
ing threshold) until you see the threshold LED light. Now adjust
the control (either lower or higher) until you have the amount of
compression you desire.
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The Active/ Bypass switch must be pressed “in” for the Levelar to
process a signal. In its “out” position, the Levelar is bypassed and
signal runs from the input jacks to the output jacks with no pro-
cessing. Use the Active/ Bypass switch when setting the Levelar’s
output level to achieve unity (no boost or cut) gain. Unity gain is
achieved when the active level is the same as the bypassed level.
process a signal. In its “out” position, the Levelar is bypassed and
signal runs from the input jacks to the output jacks with no pro-
cessing. Use the Active/ Bypass switch when setting the Levelar’s
output level to achieve unity (no boost or cut) gain. Unity gain is
achieved when the active level is the same as the bypassed level.
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In its “out” position, the Levelar’s compression ratio is an active
2.3:1 ratio. This means that for every 2.3dB over the threshold the
input signal rises, the Levelar’s output will change by 1dB. This is
a very mild and musical compression ratio which is ideal for
smoothing all types of signals.
2.3:1 ratio. This means that for every 2.3dB over the threshold the
input signal rises, the Levelar’s output will change by 1dB. This is
a very mild and musical compression ratio which is ideal for
smoothing all types of signals.
In its “in” position, the Levelar’s compression ratio is greater than
6:1. This is typically called “soft limiting” as it allows only a 1dB
change in signal level for any signal reaching over 6dB over the
set threshold. This setting is ideal for applications where exceed-
ing a set level is not desirable (mixing, popping bass, etc.).
6:1. This is typically called “soft limiting” as it allows only a 1dB
change in signal level for any signal reaching over 6dB over the
set threshold. This setting is ideal for applications where exceed-
ing a set level is not desirable (mixing, popping bass, etc.).
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The position of the Auto/ Fast switch selects the release character-
istics of the Levelar. The “out” position allows the Levelar to
recover quickly once the signal falls below the threshold. The “in”
position allows the Levelar to adjust itself depending on the char-
acteristics of the input signal. Use the “fast” setting when the sig-
nal has repetitive, consistent characteristics (kick drum, snare,
vocals, etc.). Use the “auto” setting when the signal has varying
characteristics (long decaying notes alternating with quick notes,
istics of the Levelar. The “out” position allows the Levelar to
recover quickly once the signal falls below the threshold. The “in”
position allows the Levelar to adjust itself depending on the char-
acteristics of the input signal. Use the “fast” setting when the sig-
nal has repetitive, consistent characteristics (kick drum, snare,
vocals, etc.). Use the “auto” setting when the signal has varying
characteristics (long decaying notes alternating with quick notes,
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stronger signal and will keep noise to a minimum. Microphones
must be run into a microphone preamplifier (like A R T’s Tube
MP) before being run into the Levelar. Use the XLR input for use
with equipment that provides an XLR output (like the Tube MP).
Use the 1/4” input jack for balanced or unbalanced 1/4” applica-
tions.
must be run into a microphone preamplifier (like A R T’s Tube
MP) before being run into the Levelar. Use the XLR input for use
with equipment that provides an XLR output (like the Tube MP).
Use the 1/4” input jack for balanced or unbalanced 1/4” applica-
tions.
XLR pin configuration: pin 1 = ground, pin 2 = Positive (hot),
pin 3 = negative (cold). The 1/4” TRS configuration is: Tip =
Positive (hot), Ring = Negative (cold), Sleeve = Ground.
pin 3 = negative (cold). The 1/4” TRS configuration is: Tip =
Positive (hot), Ring = Negative (cold), Sleeve = Ground.
Do not use both inputs at the same time.
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The outputs of the Levelar are active balanced. You may use it in
an unbalanced configuration without harm to the output circuitry.
Use the unbalanced 1/4” jack for sending your signal to amps,
processors or other unbalanced configurations. Use the XLR out-
put to send signals to equipment which accepts XLR connections.
Both outputs may be used at the same time.
an unbalanced configuration without harm to the output circuitry.
Use the unbalanced 1/4” jack for sending your signal to amps,
processors or other unbalanced configurations. Use the XLR out-
put to send signals to equipment which accepts XLR connections.
Both outputs may be used at the same time.
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Insert the supplied 9 Volt AC adapter’s plug into the input labeled
Pwr, 9VAC on the Levelar’s top panel.
Pwr, 9VAC on the Levelar’s top panel.
The Levelar is powered by an external 9VAC adapter. Always make
sure the output plug is securely plugged into the rear of the
Levelar, and that the adapter is held firmly in an electrical outlet.
There is a “U” shaped knock-out above the power jack which is
designed to have the power cord looped into to prevent the cord
from coming unplugged. Never operate the Levelar or AC adapter
in the rain or in wet locations. If the AC adapter’s cord is ever cut,
discontinue use and replace the adapter with a new one. Unplug
the adapter when the Levelar is not in use. Refer to the label on
the adapter or the specifications later in this manual for the
appropriate operating voltages.
sure the output plug is securely plugged into the rear of the
Levelar, and that the adapter is held firmly in an electrical outlet.
There is a “U” shaped knock-out above the power jack which is
designed to have the power cord looped into to prevent the cord
from coming unplugged. Never operate the Levelar or AC adapter
in the rain or in wet locations. If the AC adapter’s cord is ever cut,
discontinue use and replace the adapter with a new one. Unplug
the adapter when the Levelar is not in use. Refer to the label on
the adapter or the specifications later in this manual for the
appropriate operating voltages.
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The threshold control sets the point at which the Levelar will act
on a signal. Turning this control counter-clockwise lowers the
on a signal. Turning this control counter-clockwise lowers the
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