Behringer DEQ2496 Manual - Page 6

6 ULTRACURVE PRO DEQ2496 User Manual Turn the upper data wheel to select a frequency band for editing with the FREQ parameter. 31 bands are available comprising the entire frequency spectrum from 20 Hz to 20 kHz. With the large data wheel (GAIN) you can boost or cut the level of the selected band. The setting range is from -15 to +15 dB. VPQ (Virtual Paragraphic Equalizer) function The lower data wheel (BW/OCT) additionally assigns the required bandwidth to the filters. This means that the frequency bands have a peaking boost/cut characteristic around their center frequency. The number of adjacent frequency ranges influenced by this is determined by the bandwidth. The setting range is from 1/3 too 59/3. As soon as this parameter has been modified, the RESET GEQ message (left bottom part of display) changes to ACCEPT VALUES. Now, when you press the B key (or the large data wheel), the current value is stored and you can continue to enter the filter settings as required. When you press the lower data wheel, the BW/OCT parameter changes to MODE. Turn the wheel to select a HIGH or LOW shelving filter. In this case, the GAIN parameter changes to dB/OCT. Use the large data wheel to adjust the filter slope from -15 to +15 dB/oct. In HIGH mode, all frequency bands above the selected frequency are now raised or lowered in level. In LOW mode, all frequency bands below that frequency are modified. Confirm your entries with the B key (ACCEPT VALUES). The A key to the left of the display can be used in DUAL MONO mode to alternate between the left and right-channel audio signal. Keep the key pressed for some time to display the settings of both sides and edit them simultaneously. In STEREO LINK mode both channels are always processed simultaneously. The B key allows you to reset the filter settings (RESET EQ). Hit it briefly to reset the currently selected frequency band to 0.0 dB gain. Press it for about 1 s to reset all frequency bands. Single frequency bands can be reset by pressing the large data wheel. 3.2.2 PEQ menu Press the PEQ key to use parametric EQs for signal processing. On each stereo side, you have ten EQs available, which can be set to PEQ or FBD mode (Feedback Destroyer: see chapter 3.2.4). In addition to the band-pass filters, this menu offers filters of the shelving type (high or low), with a slope of 6 or 12 dB/oct. Press the PAGE or PEQ key to select the second menu page. If no parametric EQ was selected before, page 2 will be displayed immediately, providing a list of the ten available locations with all relevant parameters. Single filters can be selected either by turning the lower data wheel or by pressing the lower and upper data wheels (UP/DOWN). MODE allows you to activate the selected filter with the large data wheel (press or turn) (PARAM). This will display the associated parameters FREQ, BW(OCT) and GAIN, which can be selected by turning the upper data wheel. Value changes must be entered with the large data wheel. The GAIN setting range is from -15 to +15 dB, the frequency range (FREQ) is from 20 to 20,000 Hz. The FREQ parameter can be adjusted with two scales. The first scrolls faster through the frequency ranges (1/6 oct. per step), the second uses much finer increments (1/60 oct. per step). Press the large data wheel to alternate between these two scales. The parameter BW(OCT) adjusts the bandwidth of the band-pass filter. The "width" of the peaking characteristic (1/10 oct. to 10 oct.) is determined by this value. Additionally, you can select shelving filters here with a slope of 6 or 12 dB/oct. (e.g. L=Low, 6 dB / H=High, 12 dB, etc.) Explanation: The low-shelving filter raises (positive gain) or lowers (negative gain) the level of the frequency band below the adjusted frequency. The high-shelving filter, on the other hand, raises (positive gain) or lowers (negative gain) the level of the frequency band above the adjusted frequency. The band-pass filter raises or lowers the level of the frequency range around the center frequency. The GAIN and BW(OCT) values can be reset by pressing the large data wheel. In this menu too, the A keys selects the left and right-channel signals. If STEREO LINK modes has been selected in the UTILITIES menu (chapter 3.5), the parameter values refer to both sides. ◊ At least one filter must be activated on page 2 to be able to recall the first page of the PEQ menu. 3.2.3 DEQ menu Press the DEQ key to select the DEQ menu. Due to their complexity, the Dynamic EQs have their parameters split up on three pages. Fig. 3.2: PEQ menu (page 1) This menu comprises two pages, as can be seen in the top left part of the display. Similar to the GEQ menu, page 1 of the PEQ menu provides a graphic representation of the entire frequency range. Parameter changes can be effected with the corres-ponding controls (FREQ: upper data wheel, GAIN: large data wheel, BW/OCT: lower data wheel). To reset the selected PEQ, keep the B key to the left of the displa`y pressed for about 1 s. Or hit it briefly to select the parametric filters. Explanation: A Dynamic EQ influences a defined frequency range of a signal, based on the volume level. It can either raise or lower the level of a specific frequency, depending on the GAIN setting chosen by the user. When the GAIN setting selected causes the frequency range to be lowered in level, and when the signal exceeds a pre-defined THRESHOLD, the EQ starts processing the sound and cuts the level of the respective frequency range. The amount of attenuation applied is determined by the RATIO parameter. When the signal drops below the THRESHOLD, the frequency range is "smoothed out" again, i.e. the Dynamic EQ stops processing the frequency range. When the GAIN setting selected causes the frequency range to be raised in level, this boost depends on the volume level. As soon as the level of the selected frequency range drops below a pre-defined THRESHOLD, this results in a signal boost determined by the RATIO parameter. If the signal exceeds the threshold again, the Dynamic EQ stops processing the sound. Fig. 3.3: PEQ menu (page 2)