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ADL 700
2.2
Compressor Controls
Polarity Invert: Reverses the polarity of the signal.
Power User Tip: Use Polarity Invert when recording with more than one open
microphone to combat phase cancellation between microphones.
-20 dB Pad: The pad provides 20 dB of attenuation for the microphone preamp only.
Power User Tip: The 20 dB pad reduces the signal level coming into your ADL 700,
helping to prevent clipping and distortion from high-gain sources. Padding the input
increases "headroom" and reduces the likelihood of signal overload.
High Pass Filter: The high-pass filter's frequency threshold can be set at 20 Hz,
40 Hz, 80 Hz, or 200 Hz, or it can be turned off completely. The slope of the filter is
-12 dB/octave.
Power User Tip: A high-pass filter attenuates all frequencies below
the set threshold. Use this filter, instead of an equalizer, to remove
unwanted low frequencies from your source signal.
2.2
Compressor Controls
Threshold: Sets the threshold of the compressor. When the signal's amplitude (level)
exceeds the threshold setting, the compressor engages. Turning the knob
counterclockwise lowers the threshold so that compression begins at a lower
amplitude, and more of the input signal becomes compressed (assuming you have a
ratio setting greater than 1:1). The threshold can be set from -20 to +30 dBu.
When Threshold is turned fully counterclockwise to the ST position, all the
onboard compressor controls, except for the Make-up Gain, are bypassed,
and compression is controlled externally via the Link Connection. For more
information on stereo-linking ADL 700s, please see Section 2.8.
Power User Tip: Using the Link function will help to maintain the source's
stereo image because the compressor for both the left and right side of
the image will raise and lower the gain by the same amount.
Ratio: The Ratio control sets the compression slope, which is the relationship
between the output level and the input level. For example, if you have the ratio set to
2:1, then for every 2 dB of level increase above the threshold, the compressor's
output will only increase 1 dB. The ratio can be set from 1:1 to 4:1.
4
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