Filter OperationSee topic, About Filters and EQ, for more information. Inserting FiltersTo insert a filter into the DSP signal chain: 1. Use one of the following methods to open the processor menu.
2. Select a filter type from the processor menu. 3. The selected filter loads with default parameters, and the FILT block name changes to reflect the name of the filter type. The FILT block color changes to a shade of green. To insert additional filters: 1. Double-click the filter block to open the filter dialog box. 2. Select a filter type from the drop-down filter selection list for an Unused filter. 3. The Filter loads with default parameters. If filter types are not identical, the FILT block name changes from the name of the filter type to "FILT." NOTE: All filter parameters are modified via the FILT block dialog box. Each filter loads with all applicable default parameters, displayed to the right of each drop-down filter selection list. Default parameters can be changed under Tools | Options. Modifying Filter ParametersThe graph displays the composite curve of all unbypassed filters, indicated with a red line. To select an individual filter for editing, click the filter number to the left of the filter selection drop-down list, or click the frequency handle. When selected, the individual filter curve is shown independent of the composite curve, in the same color as the filter’s row in the type/parameters table (see screenshot below). Bypassed filters will not appear in the filter composite. However, when selected, a bypassed filter will appear as a dotted line independent of the composite curve. To modify Frequency: 1. Click + hold the frequency parameter handle, located above the graph. Frequency handles are numbered to correspond to the filter number. 2. Drag the frequency parameter handle left or right to the desired position/value. To modify Boost/Cut: 1. Bring focus to the filter that you want to modify by either clicking the filter number to the left of the filter type, or clicking the frequency parameter handle above the graph. 2. Click + hold the boost/cut handle within the graph, located at the center frequency. 3. Drag the boost/cut handle up or down to the desired position/value. To modify Q (bandwidth): 1. Bring focus to the filter that you want to modify by either clicking the filter number to the left of the filter type, or clicking the frequency parameter handle above the graph. 2. Click + hold one of the Q handles within the graph, located at the lower or upper frequency on the filter curve. 3. Drag the Q handle left or right to the desired position/value. To modify Boost/Cut (Bass & Treble only): 1. Bring focus to the filter that you want to modify by either clicking the filter number to the left of the filter type, or clicking the frequency parameter handle above the graph. 2. Mouse over the frequency curve to be affected, to enable the grabber (hand) cursor. For the Bass filter, this area is below the corner frequency. For the Treble filter, this area is above the corner frequency. 3. Drag the frequency curve up or down to the desired position/value. To modify Slope (HP, LP, Bass, or Treble only): 1. Open the Slope drop-down list for the desired filter. 2. Select the desired slope value.
Bypass must be disengaged for each filter before filter results are shown in the composite response graph. When a bypassed filter is focused (selected), it will appear in the graph as a dotted line. The graph indicates the focused filter result in the graph, as well as the frequency handle, with the same color as the filter's row in the type/parameters table, while the composite response of all other filters is displayed in red. NOTE: Bass & Treble filters are intended to serve as a "Tone" control in the Line Output signal chain. However, the filter type can be altered for either or both filters. For information on inserting other filters, see topic, Filter Operation. |
