dbx DDP, Руководство оператора, Страница: 20 / 165

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Auto Mode: (Off/On) Activating Auto mode disables the Attack, Hold and Release controls. Attack and release
settings become fully program-dependent, and manual changes in the settings do not have any effect on the audio
signal or the response of the compressor. Auto mode is especially effective on signals such as vocals or other
highly dynamic signals. Most factory setups use Auto mode because of its ability to perform smooth compression
under widely varying circumstances.
Threshold: (From -60dB to +4dB) Setting the threshold is the same on the compressor as it is on the gate or lim-
iter. There is a visual representation of the threshold on the curve window, and as you edit the parameter, you
will see motion up or down on the curve window, allowing much greater understanding of the effects of each
parameter on the entire compression algorithm.
Ratio: (From 1:1 through
∞
:1) As the signal passes through the threshold region, it begins to be compressed at
the rate set with the ratio setting. It is expressed in a ratio for ease of use, for example, with a ratio setting of 4:1,
the signal would have to increase by 4dB in input to increase the output by 1dB. With the wide-ranging control
on the DDP, it is possible to achieve very smooth, transparent compression as well as heavy, “in-your-face” com-
pression effects.
Gain: (From -20dB to +20dB) When a signal is compressed, by definition some of its gain is taken away. It there-
fore typically becomes necessary to boost the now-compressed signal back up to a useable level. By doing so, the
average signal level has been increased, so it sounds louder than before compression. As you make this adjust-
ment you can see the effect in the curve window. Note that if you add too much gain, the clip icon willappear in
the curve window. If this happens, either reduce the gain or use the limiter. The compressed signal is now more
dynamically controlled and can be boosted to a level that was not possible before it was compressed.
Attack: (From 0.1ms to 200ms) As the signal exceeds the threshold, the speed at which the compressor begins to
react is set by the Attack control. Its range is from very fast to somewhat slow, allowing you to have all the con-
trol you want. The Attack control is active when not in Auto mode (see Auto mode above).
Hold: (From 0ms to 500ms) The hold time sets the amount of time the compressor waits before it begins to
release after the signal passes below the threshold. If the signal goes back above the threshold, the hold time is
“restarted” and will hold the compressor at that amount of gain reduction for the set time, after the signal once
again moves below the threshold. The Hold control is active when not in Auto mode (see Auto mode above).
Release: (From 360dB/sec to 5dB/sec) The release control sets the speed at which the signal is returned to nor-
mal level after it has gone below the threshold, and the Hold time has been exceeded. The Release control is
active when not in Auto mode (see Auto mode above).
When Auto Mode is activated, the Attack, Hold and Release controls
are program-dependent and are not affected by your manual settings.
Section 4: Editing/Saving/Recalling Programs