173 HD96-24-CC-TP User Manual
Dynamic EQ
The dynamic EQ is a 4-band parametric dynamic equaliser, which is able to provide frequency selective compression or expansion. The dynamic EQ features
proportional-q lters that, when boosting or cutting by small amounts, reduce the bandwidth of the lter compared to the setting at maximum cut/boost. Filter
coecients are calculated at the audio rate to provide a lightning fast attack time, which is essential for transparent operation. Each band features a full-band EQ type
that switches out the EQ lter so that the band operates as a non-frequency selective, or 'full-band' compressor/expander. The Fixed button turns any dynamic EQ
band into a non-dynamic EQ if required. The amount of gain is xed as set by the controls.
Flexible routing options allow for the following conguration modes:
1. One chain of stereo 4-band processing.
2. Two chains of stereo 2-band processing.
3. Four segments of stereo single-band processing.
Item Control Function
1 Close Eect Closes the currently open eect.
2 Input meter 20 LEDs, which show input metering.
3 Comp Gain reduction Meter 20 LEDs, which show the selected band gain reduction metering.
4 EXP Expansion Meter 20 LEDs, which show the selected band expansion metering.
5 Threshold
Turn to set the signal threshold level above (or below) which the eect is to take place. Turning
anti-clockwise reduces the signal level needed to exceed the threshold, and therefore increases
sensitivity. Signal’s exceeding threshold initiate the selected processing. Turning clockwise increases
the signal level needed and reduces sensitivity. When set fully clockwise, the threshold is set to
+20dBu.
6 Freq Frequency
Turn to set the centre frequency of the dynamic activity. Note that the range of each band is 40 Hz
to 18 kHz
7 Ratio Sets the Ratio for compression or Expansion
8 Width
Controls bandwidth or ‘Q’. Turn clockwise to widen or defocus the aected band of frequencies. Turn
anti-clockwise to narrow or sharpen the aected band.
9 Bell Switches the selected band to a bell shape.
10 LF Shelving Switches selected band to a Low Frequency shelving response
11 HF Shelving Switches selected band to a High Frequency shelving response
12 Flat Switches selected band to a at (wide-band) response.