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The General (2nd-Order) block gives access to a wide variety of 2nd-order (biquad)filter algorithms.
The available filter types are:
To open the filter control window, click on the icon button. Select the desired filter type from the drop-down combo-box list. The filter controls and the icon button image will change to reflect the selected filter type.
Name | ADSP-214xx | ADSP-215xx/SC5xx | ADAU145x/146x |
---|---|---|---|
—————————————————- | ——————-- | ——————————-- | —————————- |
General Second Order | B/S | B/S | S |
General Eq Slew | NA | NA | S |
General Second Order SW Slew Ext | NA | NA | S |
Name | Type | Description |
---|---|---|
——————————————— | —————————— | ———————————————— |
Input0 | Audio | Input Channel 0 |
Lambda0 (For Slew Ext Only) | Control | External Slew Input for Stage 0 |
Name | Type | Description |
---|---|---|
—————————————— | —————————— | ———————————————— |
Output0 | Audio | Output channel 0 |
GUI Parameter Name | Default Value | Range | Function Description |
---|---|---|---|
———————————————————- | ————————— | ——————————————— | ———————————————————- |
StageX_Boost | 0 dB | -10 to +10 dB | Set the boost value for a particular filter curve |
StageX_Frequency | 1000 | 0 to 96000Hz | Cut-off frequency |
StageX_Gain | 0 dB | -15 to +15 dB | Filter Gain |
StageX_Q | 1.41 | 0.1 to 16 | Q factor of the filter |
StageX_Slope | 1 | 0 to 2 | Slope controls filter steepness and therefore the transition between the boost/cut and the flat response. |
StageX_FilterType | Parametric filter | Available filter Types | Controls the type of the filter |
StageX_EnabledOrBypassed | True | True/False | Enabled/Disabled the algorithm |
StageX_Phase | False | True/False | Controls the phase of coefficients in 0 degree or 180 degree phase |
StageX_LockFrequency | False | True/False | Enabled/Disabled locks the frequency control |
StageX_Slew (For Slew Variant ADAU145x/146x Only) | 0 | 0 to 1 | SW slew value for individual filter stages applicable only for General EQ Slew Variant |
NumStages | 1 | 1 to 20 | Number of stages of filter. Change in this value requires re-compilation |
NumChannels | 1 | 1 to 20 | Number of input and output channels. Change in this value requires re-compilation |
SlewType (For Slew Variant ADAU145x/146x Only) | HWSlew | HW/SW Slew | Slew type for the filter HW/SW |
CustomSlew (For Slew Variant ADAU145x/146x Only) | 0x208A | 0x0 to 0xFFFF | Custom slew value entered by user |
Here, * X - Indicates Stage Number
Parameter Name | Description | ADSP-214xx/SC5xx/215xx | ADAU145x/146x |
---|---|---|---|
———————————— | ————————————————————————————— | —————————————- | —————————- |
StageX_B0 | B0 Filter Coefficient | Float | FixPoint8d24 |
StageX_B1 | B1 Filter Coefficient | Float | FixPoint8d24 |
StageX_B2 | B2 Filter Coefficient | Float | FixPoint8d24 |
StageX_A1 | A1 Filter Coefficient | Float | FixPoint8d24 |
StageX_A2 | A2 Filter Coefficient | Float | FixPoint8d24 |
slew_mode | Slew value for medium size eq slew variant only | NA | Integer32 |
StageX_Lambda | Exponential decay value of filter stage X for SW slew type only | NA | FixPoint8d24 |
Here,