This version (18 May 2021 09:05) was approved by Sreesha Y M.
Table of Contents
Click here to return to the Filters page
Parametric EQ
Description
The Parametric EQ block extends the functionality of the General (2nd-Order) filter with an enhanced graphical filter design tool. In addition, multiple 2-nd order filter stages can be cascaded to create complex filter responses.
This filter provides:
Graphical design of filter response curves.
High order filtering, via cascaded 2nd order filters (maximum of 15)
Independent filter type and settings for each filter stage.
The Filter Types Supported :
Peaking
ToneLowShelf
ToneHighShelf
GeneralLowPass
GeneralHighPass
ButterworthLowPass
ButterworthHighPass
BesselLowPass
BesselHighPass
ChebyshevLowPass
ChebyshevHighPass
FirstOrderFilter
IIRCoefficient
AllPass
Usage
To open the graphical window, click on the icon button. This filter provides:
Graphical design of filter response curves.
Independent filter type and settings for each response curve.
Loading of filter coefficients from a text file containing the same.
Targets Supported
| Name | ADSP-214xx | ADSP-215xx/SC5xx | ADAU145x/146x |
|---|---|---|---|
| ————————- | ——————-- | ——————————-- | —————————- |
| Parametric EQ | B/S | B/S | S |
Pins
Input
| Name | Type | Description |
|---|---|---|
| —————————— | —————————— | ———————————————— |
| Input0 | Audio | Input to the filter |
Output
| Name | Type | Description |
|---|---|---|
| —————————— | —————————— | ———————————————— |
| Output0 | Audio | The filtered output |
Configurable Parameters
| GUI Parameter Name | Default Value | Range | Function Description |
|---|---|---|---|
| ————————————— | ————————— | —————————————- | ———————————————————- |
| NumFilters | 0 | 0 to 99 | Selects a filter response curve by filter number selected |
| FilterType_Filter0 | 0 | 0 to 13 | Select the type of filter |
| SubType_Filter0 | 0 | 0 to 3 | The “Sub Type” section is only available for the First Order filter type. In first order mode, you have the flexibility of choosing between two cascaded first order filters in a configuration of Low - Low, Low - High, High - Low, or High - High combinations. The “Active 1” and “Active 2” check boxes also apply to First Order filters only, and allow you to independently enable or disable either of the two first order filters. |
| Boost_Filter0 | 10 dB | -150 to +30 dB | Set the boost value for a particular filter curve |
| Frequency1_Filter0 | 100 Hz | 0 to 96000Hz | Cut-off frequency |
| Frequency2_Filter0 | 1000 Hz | 0 to 96KHz | Cut-off frequency |
| Gain1_Filter0 | 6 dB | -96 to +10 dB | Filter Gain |
| Gain2_Filter | 0 dB | -96 to +10 dB | Filter Gain |
| QFactor_Filter0 | 1.41 | 0.05 to 15 | Q factor of the filter |
| Ripple_Filter0 | 0.1 | 0.1 to 5 | Set the Ripple factor for particular filter type(this control is not enabled for all filter types) |
| EnabledOrBypassed | True | True/False | Enabled/Disabled the algorithm |
| NumChannels | 1 | 1 to 20 | Number of input and output channels. Change in this value requires re-compilation |
DSP Parameters
| Parameter Name | Description | ADSP-214xx/SC5xx/215xx | ADAU145x/146x |
|---|---|---|---|
| ———————————- | ——————————————————————————————— | —————————————- | —————————- |
| GainArray | Filter Coefficient Array consisting of all filter coefficients | Float | NA |
| A1_X | Filter coefficient A1 of bi-quad stage 0 | NA | FixPoint8d24 |
| A2_X | Filter coefficient A2 of bi-quad stage 0 | NA | FixPoint8d24 |
| B0_X | Filter coefficient B0 of bi-quad stage 0 | NA | FixPoint8d24 |
| B1_X | Filter coefficient B1 of bi-quad stage 0 | NA | FixPoint8d24 |
| B2_X | Filter coefficient B2 of bi-quad stage 0 | NA | FixPoint8d24 |
Note : X Stands for the filter index
resources/tools-software/sigmastudiov2/modules/filters/parametriceq.txt · Last modified: 13 May 2021 13:57 by Sreesha Y M