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The Nth Order Filter is a combination of bi-quad filters to form Nth order filter.The Filter has 3 selectable filter types to perform LowPass/HighPass filtering.
The available filter types are:
Name | ADSP-214xx(Sample) | ADSP-214xx(Block) | ADSP-215xx/ADSP-SC5xx(Sample) | ADSP-215xx/ADSP-SC5xx(Block) |
---|---|---|---|---|
Nth Order Filter | No | No | No | Yes |
Input0 | Audio | Input Channel 0 |
Output0 | Audio | Output channel 0 |
GUI Parameter Name | Default Value | Range | Function Description |
---|---|---|---|
Frequency | 1000 | 3 to 30 KHz | Cut-off frequency |
Gain | 0 dB | -10 to +10 dB | Filter Gain |
Q | 1.41 | 1 to 15 | Q factor of the filter |
Order | 6 | 2 to 20 | Order of the filter |
Ripple | 1 | 0.1 to 20 | Ripple factor of the filter |
FilterType | Butterworth | Available filters | Used to select the filter type |
EnabledOrBypassed | True | True/False | Enabled/Disabled the algorithm |
Phase | False | True/False | Controls the phase of coefficients in 0 degree or 180 degree phase |
IsLowPass | True | True/False | Controls the Lowpass or HighPass filter |
NumChannels | 1 | 1 to 6 | Number of input and output channels. Change in this value requires re-compilation |
Parameter Name | Description | ADSP-214xx/SC5xx/215xx |
---|---|---|
Stages | number of bi-quads cascaded | Float |
A1_Stage0 | Filter coefficient A1 of bi-quad stage 0 | Float |
A2_Stage0 | Filter coefficient A2 of bi-quad stage 0 | Float |
B0_Stage0 | Filter coefficient B0 of bi-quad stage 0 | Float |
B1_Stage0 | Filter coefficient B1 of bi-quad stage 0 | Float |
B2_Stage0 | Filter coefficient B2 of bi-quad stage 0 | Float |