Filter Operation

Filters that can be added into the DSP signal chain include:

• High Pass Filter

• Low Pass Filter

• Bass and Treble

• Parametric EQ

See the About Filters and EQ section for more information.

Inserting Filters

To insert a filter into the DSP signal chain:

1. Open the processor menu using one of the following methods:

2. Double-click the FILT (filter) block in the DSP Configurator workspace.

3. Right-click the FILT block to open the context menu and select Insert.

4. Click the FILT block to select it (or use the arrow keys to navigate to the FILT block) and press the <Enter> key on your keyboard.

2. From the drop-down processor menu, select the desired filter type. The processor loads with default parameters and the FILT block name changes to reflect the name of the selected filter type. The FILT block color changes to a shade of green.

To load additional filters:

1. Double-click the FILT block to which a filter has been inserted. The Filter dialog box opens.

2. From the drop-down list of an unused filter (Unused is the selected option), select the desired filter type to load. The filter loads with default parameters. If the selected filter types are not identical, the FILT block name changes from the name of the filter type to FILT.

Modifying Filter Parameters

The graph in the Filter dialog box displays the composite curve of all unbypassed filters, which is indicated by 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 and in the same color as the filter row in the type and parameter table. See the image below for more details about the graph.

Bypassed filters do not appear in the filter composite. However, when selected, a bypassed filter appears as a dotted line independent of the composite curve.

To modify frequency:

1. Double-click the FILT block for an inserted filter. The Filter dialog box opens.

2. Select the filter that you want to modify. To do so, either click the filter number to the left of the filter type or click the frequency parameter handle above the graph (see the image above).

3. Click and drag the frequency parameter handle left or right to the desired position or value.

To modify boost/cut:

1. Double-click the FILT block for an inserted filter. The Filter dialog box opens.

2. Select the filter that you want to modify. To do so, either click the filter number to the left of the filter type or click the frequency parameter handle above the graph (see the image above).

3. Click and hold the boost/cut handle in the graph, located at the center frequency.

4. Drag the boost/cut handle up or down to the desired position or value.

To modify Q (bandwidth):

1. Double-click the FILT block for an inserted filter. The Filter dialog box opens.

2. Select the filter that you want to modify. To do so, either click the filter number to the left of the filter type or click the frequency parameter handle above the graph (see the image above).

3. Click and hold one of the Q handles within the graph, located at the lower or upper frequency on the filter curve.

4. Drag the Q handle left or right to the desired position or value.

To modify boost/cut (bass and treble only):

1. Double-click the FILT block for an inserted filter. The Filter dialog box opens.

2. Select the filter that you want to modify. To do so, either click the filter number to the left of the filter type or click the frequency parameter handle above the graph (see the image above).

3. Mouse over the frequency curve to be adjusted in order 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.

4. Click and drag the frequency curve up or down to the desired position or value.

To modify slope (high pass, low pass, bass, or treble only):

1. Double-click the FILT block for an inserted filter. The Filter dialog box opens.

2. From the Slope drop-down list for the desired filter, select the desired slope value.

Disengage the Bypass option for each filter before filter results are displayed in the composite response graph.

When you select a bypassed filter, it appears as a dotted line in the graph. The selected filter result and the frequency handle are indicated (in the graph) by the same color as the filter row in the Type and Parameters table at the bottom of the Filter dialog box. The composite response of all other filters is displayed in red.