This version is outdated by a newer approved version.
This version (18 May 2021 09:04) was approved by John Joseph.The Previously approved version (08 Jun 2020 12:51) is available.
This version (18 May 2021 09:04) was approved by John Joseph.The Previously approved version (08 Jun 2020 12:51) is available.This is an old revision of the document!
Table of Contents
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Crossover Filters
Description
The Crossover block includes 2-way and 3-way crossover filters, typically used in loudspeaker systems to split the audio signal into separate frequency bands.
This filter provides:
2-way or 3-way crossover filtering.
Graphical design of crossover response.
Selectable crossover types: Linkwitz-Riley, Butterworth, Bessel.
Selectable filter orders: 2nd, 3rd, 4th, 6th, and 8th
Usage
Targets Supported
| Name | ADSP-214xx | ADSP-215xx/SC5xx | ADAU145x/146x |
|---|---|---|---|
| —————————- | ——————-- | ——————————-- | —————————- |
| Crossover 3 Way | NA | B/S | S |
| Crossover 2 Way | NA | B/S | S |
Pins
Input
| Name | Type | Description |
|---|---|---|
| ———————————-- | —————————— | ————————————-- |
| Input0 | Audio | Input Channel 0 |
Output
| Name | Type | Description |
|---|---|---|
| ———————————————————-- | —————————— | ———————————————— |
| Output0 | Audio | Output channel 0 |
| Output1 | Audio | Output channel 1 |
| Output2 (CrossOver 3 Way Only) | Audio | Output channel 2 |
Configurable Parameters
| GUI Parameter Name | Default Value | Range | Function Description |
|---|---|---|---|
| ————————————— | ————————— | ——————————————— | ———————————————————- |
| LowFrequency | 250 | 3 to 30 KHz | Cut-off frequency for Low Filter |
| MidLowFrequency | 250 | 3 to 30 KHz | Cut-off frequency for Mid-Low filter |
| MidHighFrequency | 3000 | 3 to 30 KHz | Cut-off frequency for Mid-High Filter |
| HighFrequency | 3000 | 3 to 30 KHz | Cut-off frequency for High Filter |
| LowGain | 0 dB | -10 to +10 dB | Filter Gain for Low Filter |
| MidLowGain | 0 dB | -10 to +10 dB | Filter Gain for Mid-Low Filter |
| MidHighGain | 0 dB | -10 to +10 dB | Filter Gain for Mid-High Filter |
| HighGain | 0 dB | -10 to +10 dB | Filter Gain for High Filter |
| LowFilterType | Linkwitz-Riley | Filters List | Used to select the filter type for Low Filter |
| MidLowFilterType | Linkwitz-Riley | Filters List | Used to select the filter type for Mid-Low Filter |
| MidHighFilterType | Linkwitz-Riley | Filters List | Used to select the filter type for Mid-High Filter |
| HighFilterType | Linkwitz-Riley | Filters List | Used to select the filter type for High Filter |
| LowInvertPolarity | False | True/False | Invert polarity of Low Filter |
| HighInvertPolarity | False | True/False | Invert Polarity of High Filter |
| LinkLowMidFilters | False | True/False | Link the low and mid low filters to ensure frequency changes in the two filters are same |
| LinkMidHighFilters | False | True/False | Link the high and mid high filters to ensure frequency changes in the two filters are same |
Note : Mid Low and Mid High filters and their parameters are only applicable for Crossover 3 Way Filters.
DSP Parameters
| Parameter Name | Description | ADSP-214xx/SC5xx/215xx | ADAU145x/146x |
|---|---|---|---|
| ———————————— | ———————————————————————————————— | —————————————- | —————————- |
| LowPolarity | Polarity Inversion Status of Low Filter | FixInt32 | FixInt32 |
| HighPolarity | Polarity Inversion Status of High Filter | FixInt32 | FixInt32 |
| LowFilterCount | Number of bi-quads for Low Filter Type | FixInt32 | FixInt32 |
| MidFilterCount | Number of bi-quads for Mid Filter Type | FixInt32 | FixInt32 |
| HighFilterCount | Number of bi-quads for High Filter Type | FixInt32 | FixInt32 |
| A1_FilterType | Filter coefficient A1 of bi-quad stage X Mid/Low/High FilterType | Float | Float |
| A2_FilterType | Filter coefficient A2 of bi-quad stage X Mid/Low/High FilterType | Float | Float |
| B0_FilterType | Filter coefficient B0 of bi-quad stage X Mid/Low/High FilterType | Float | Float |
| B1_FilterType | Filter coefficient B1 of bi-quad stage X Mid/Low/High FilterType | Float | Float |
| B2_FilterType | Filter coefficient B2 of bi-quad stage X Mid/Low/High FilterType | Float | Float |
Note FilterType Refers to Low, Mid-Low, Mid-High and High.
resources/tools-software/sigmastudiov2/modules/filters/crossover.1620906434.txt.gz · Last modified: 13 May 2021 13:47 by Sreesha Y M