Instrument
Familiar
isat
ion:
Front
Panel
Controls
6 | 7 | 8 | 9 | 15 | 13 | 17 | 18 |
1 | 2 | 3 | 4 | 5 | 10 | 11 | 12 | 14 | 16 |
The DN500 Plus Dual Compressor/Limiter/Expander consists of two identical channels, each with separate Compressor, Expander and Limiter sections.
Compressor
1.Threshold determines the level above which gain reduction (compression) will take place, variable from +20dBu down to
2.Ratio sets the degree of compression applied above the threshold level, variable from 1:1 to 50:1. A ratio of 1:1 corresponds to zero compression : Signal In = Signal Out. A ratio of 10:1 indicates that when the input signal, above the threshold, rises in level by 10dB, the output level will rise 1dB.
3.Knee calibrated from 1 to 40, adjusts the 'hardness' or 'softness' of the compression effect. A hard knee means that when the input signal level rises above the threshold, it is immediately compressed at the full ratio as set. A soft knee means that compression will start below the threshold level at a low ratio and gradually attain the full ratio selected only at higher levels.
4.Attack sets the time taken for compression to commence after the threshold is exceeded, from 0.05 milliseconds (50 microseconds) to 20 milliseconds.
5.Release determines the time taken for the gain to return to normal after the signal drops below the threshold level, adjustable from 60 milliseconds to 2 seconds.
6.The Bypass switch selects the whole channel to be in or out of circuit.
7.Stereo links the two channels of the DN500 Plus together, so that they are both operated from the controls of Channel A, apart from the Limiter sections which always work individually. In stereo mode, the unit still monitors the levels of both channels to detect when the signal is above the threshold level (on Channel B, the Stereo switch is replaced by a 'Stereo Slave' light indicator).
8.Comp In selects the compression effect to be in or out.
9.ENV allows the setting of attack and release times to be automatic or manual. On Auto, the attack time of the input signal and the amount by which it exceeds the threshold level are assessed, and suitable Compressor attack and release values set to give an almost undetectable reduction in signal dynamic range. On Manual, the rotary Attack and Release controls come into operation.
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