This version (18 May 2021 09:03) was approved by John Joseph.The Previously approved version (19 Jan 2021 05:33) is available.
Table of Contents
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General Eq Blend
Description
The General (2nd-Order) block gives access to a wide variety of 2nd-order (biquad)filter algorithms along with equalization. Blend factor and slew rate modifications are allowed on the module for each stage.
The available filter types are:
- Unordered List ItemOrdered List ItemParametric
- Shelving
- General High-Pass
- General Low-Pass
- General Band-Pass
- General Band-Stop
- Butterworth Low-Pass / High-Pass
- Bessel Low-Pass / High-Pass
- Tone Control
- IIR Coefficient (direct coefficient entry)
- 1st-Order Low-Pass / High-Pass
- All-pass
- Peaking
- Notch
- Chebyshev Low-Pass / High-Pass
Usage
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.
Variants
General Equalizer module with External blend factor(General Eq Ext Blend). The number of Blend pins varies with the number of stages opted for.
Targets Supported
| Name | ADSP-214xx | ADSP-215xx/SC5xx | ADAU145x/146x |
|---|---|---|---|
| ————————————-- | ——————-- | ——————————-- | —————————- |
| GeneralEqBlend | B/S | B/S | S |
| GeneralEqBlendExt | B/S | B/S | S |
Pins
Input
| Name | Type | Description |
|---|---|---|
| ——————————————— | —————————— | ———————————————— |
| Input0 | Audio | Input Channel 0 |
| Blend0 | Control | External Blend pin for GeneralEqExtBlend variant |
Output
| Name | Type | Description |
|---|---|---|
| ——————————————— | —————————— | ———————————————— |
| Output0 | Audio | Output channel 0 |
Configurable Parameters
| GUI Parameter Name | Default Value | Range | Function Description |
|---|---|---|---|
| ———————————————————- | ————————— | ——————————————— | ———————————————————- |
| StageX_FilterY_Boost | 0 dB | -10 to +10 dB | Set the boost value for a particular filter curve |
| StageX_FilterY_Frequency | 1000 | 0 to 96000Hz | Cut-off frequency |
| StageX_FilterY_Gain | 0 dB | -15 to +15 dB | Filter Gain |
| StageX_FilterY_Q | 1.41 | 0.1 to 16 | Q factor of the filter |
| StageX_FilterY_Slope | 1 | 0 to 2 | Slope controls filter steepness and therefore the transition between the boost/cut and the flat response. |
| StageX_FilterY_FilterType | Parametric filter | Available filter Types | Controls the type of the filter |
| StageX_FilterY_EnabledOrBypassed | True | True/False | Enabled/Disabled the algorithm |
| StageX_FilterY_Phase | False | True/False | Controls the phase of coefficients in 0 degree or 180 degree phase |
| StageX_Slew | 0 | 0 to 1 | Slew value for individual filter stages |
| StageX_Blend | 0 | 0 to 1 | Blend value for individual filter stage |
| 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 |
Here, * X - Indicates Stage Number
* Y - Indicates Filter A/Filter B
DSP Parameters
| Parameter Name | Description | ADSP-214xx/SC5xx/215xx | ADAU145x/146x |
|---|---|---|---|
| ———————————— | ———————————————————- | —————————————- | —————————- |
| StageX_FilterY_B0 | B0 Filter Coefficient | Float | FixPoint8d24 |
| StageX_FilterY_B1 | B1 Filter Coefficient | Float | FixPoint8d24 |
| StageX_FilterY_B2 | B2 Filter Coefficient | Float | FixPoint8d24 |
| StageX_FilterY_A1 | A1 Filter Coefficient | Float | FixPoint8d24 |
| StageX_FilterY_A2 | A2 Filter Coefficient | Float | FixPoint8d24 |
| StageX_Slew_Lambda | Exponential decay value of filter stage X | Float | FixPoint8d24 |
Here,
- X - Stage Number (Changes for each stage coefficients)
- Y - Filter A/B for each stage X
resources/tools-software/sigmastudiov2/modules/filters/generaleqblend.txt · Last modified: 15 May 2021 15:40 by Sreesha Y M