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This version (18 May 2021 09:04) was approved by John Joseph.The Previously approved version (08 Jun 2020 12:51) is available.Diff

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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/SS
Crossover 2 Way NA B/SS


Pins

Input

NameTypeDescription
———————————-- —————————— ————————————--
Input0AudioInput Channel 0

Output

NameTypeDescription
———————————————————-- —————————— ————————————————
Output0AudioOutput channel 0
Output1AudioOutput channel 1
Output2 (CrossOver 3 Way Only)AudioOutput channel 2


Configurable Parameters

GUI Parameter NameDefault ValueRangeFunction Description
————————————————————————————————————————————————————————-
LowFrequency2503 to 30 KHzCut-off frequency for Low Filter
MidLowFrequency2503 to 30 KHzCut-off frequency for Mid-Low filter
MidHighFrequency30003 to 30 KHzCut-off frequency for Mid-High Filter
HighFrequency30003 to 30 KHzCut-off frequency for High Filter
LowGain0 dB-10 to +10 dBFilter Gain for Low Filter
MidLowGain0 dB-10 to +10 dBFilter Gain for Mid-Low Filter
MidHighGain0 dB-10 to +10 dBFilter Gain for Mid-High Filter
HighGain0 dB-10 to +10 dBFilter Gain for High Filter
LowFilterTypeLinkwitz-RileyFilters ListUsed to select the filter type for Low Filter
MidLowFilterTypeLinkwitz-RileyFilters ListUsed to select the filter type for Mid-Low Filter
MidHighFilterTypeLinkwitz-RileyFilters ListUsed to select the filter type for Mid-High Filter
HighFilterTypeLinkwitz-RileyFilters ListUsed to select the filter type for High Filter
LowInvertPolarityFalseTrue/FalseInvert polarity of Low Filter
HighInvertPolarityFalseTrue/FalseInvert Polarity of High Filter
LinkLowMidFiltersFalseTrue/FalseLink the low and mid low filters to ensure frequency changes in the two filters are same
LinkMidHighFiltersFalseTrue/FalseLink 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
———————————— ———————————————————————————————— —————————————- —————————-
LowPolarityPolarity Inversion Status of Low FilterFixInt32FixInt32
HighPolarityPolarity Inversion Status of High FilterFixInt32FixInt32
LowFilterCountNumber of bi-quads for Low Filter TypeFixInt32FixInt32
MidFilterCountNumber of bi-quads for Mid Filter TypeFixInt32FixInt32
HighFilterCountNumber of bi-quads for High Filter TypeFixInt32FixInt32
A1_FilterTypeFilter coefficient A1 of bi-quad stage X Mid/Low/High FilterTypeFloatFloat
A2_FilterTypeFilter coefficient A2 of bi-quad stage X Mid/Low/High FilterTypeFloatFloat
B0_FilterTypeFilter coefficient B0 of bi-quad stage X Mid/Low/High FilterTypeFloatFloat
B1_FilterTypeFilter coefficient B1 of bi-quad stage X Mid/Low/High FilterTypeFloatFloat
B2_FilterTypeFilter coefficient B2 of bi-quad stage X Mid/Low/High FilterTypeFloatFloat


Note FilterType Refers to Low, Mid-Low, Mid-High and High.

resources/tools-software/sigmastudiov2/modules/filters/crossover.txt · Last modified: 13 May 2021 13:47 by Sreesha Y M