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Tools: Topology: Build topology with 2-way speaker crossover
This patch adds modifications to cavs-sdw.conf and sdw-amp-generic.conf to optionally build the topology with crossover filter for 2-way woofer/tweeter speakers. The build topology with crossover feature is function topology sof-sdca-2amp-id2-xover.tplg. The speaker pipeline with added micsel/selector and eqiir components implements the crossover filter with the supplied configuration blobs. The currently built topology duplicates a stereo L,R stream into L,R,L,R stream and applies 4th order Linkwitz-Riley low-pass for the first pair and high-pass for the second pair. The crossover frequency is set to 2 kHz as example. The crossover parameters should be changed to match the acoustical design of speaker acoustics of the device. Also there could be different channels mappings and high/low-pass apply need. Other variants can be created with the Octave scripts in the next patch. Signed-off-by: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>
1 parent cf01b6c commit 6f221b5

8 files changed

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‎tools/topology/topology2/cavs-sdw.conf‎

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<host-copier-gain-mixin-playback.conf>
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<mixout-gain-alh-dai-copier-playback.conf>
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<mixout-gain-eqiir-eqfir-drc-alh-dai-copier-playback.conf>
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<mixout-gain-eqiir-eqfir-drc-micsel-eqiir-alh-dai-copier-playback.conf>
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<dai-copier-gain-eqiir-module-copier-capture.conf>
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<gain-capture.conf>
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<gain-copier-capture.conf>
@@ -92,6 +93,10 @@ Define {
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EFX_MIC_TDFB_PARAMS "line2_generic_pm10deg"
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EFX_MIC_DRC_PARAMS "dmic_default"
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DMIC0_DAI_EQIIR "highpass_40hz_20db"
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SDW_AMP_NUM_CHANNELS 2
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SDW_AMP_XOVER false
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SDW_AMP_XOVER_SELECTOR_PARAMS default
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SDW_AMP_XOVER_EQIIR_PARAMS default
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}
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# override defaults with platform-specific config

‎tools/topology/topology2/include/components/eqiir/xover_lr4_2000hz_lhlh_48khz.conf‎

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# LR4 filter bank coefficients 27-Aug-2025
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# cd src/audio/eq_iir/tune; octave sof_example_lr4.m
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Object.Base.data."IIR" {
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bytes "
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0x53,0x4f,0x46,0x34,0x00,0x00,0x00,0x00,
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0xcc,0x00,0x00,0x00,0x01,0xd0,0x01,0x03,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0xcc,0x00,0x00,0x00,0x04,0x00,0x00,0x00,
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0x02,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x01,0x00,0x00,0x00,0x02,0x00,0x00,0x00,
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0x02,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x2d,0x3a,0xcd,0xd3,
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0xc0,0xf5,0x82,0x68,0xb9,0x41,0x76,0x00,
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0x72,0x83,0xec,0x00,0xb9,0x41,0x76,0x00,
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0x00,0x00,0x00,0x00,0x00,0x40,0x00,0x00,
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0x2d,0x3a,0xcd,0xd3,0xc0,0xf5,0x82,0x68,
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0xb9,0x41,0x76,0x00,0x72,0x83,0xec,0x00,
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0xb9,0x41,0x76,0x00,0xff,0xff,0xff,0xff,
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0x65,0x7f,0x00,0x00,0x02,0x00,0x00,0x00,
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0x02,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x7e,0x70,0xdd,0xd6,
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0xc0,0xf5,0x82,0x68,0xb6,0x9e,0x44,0x1a,
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0x94,0xc2,0x76,0xcb,0xb6,0x9e,0x44,0x1a,
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0x00,0x00,0x00,0x00,0x00,0x40,0x00,0x00,
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0x7e,0x70,0xdd,0xd6,0xc0,0xf5,0x82,0x68,
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0xb6,0x9e,0x44,0x1a,0x94,0xc2,0x76,0xcb,
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0xb6,0x9e,0x44,0x1a,0xfe,0xff,0xff,0xff,
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0x92,0x41,0x00,0x00"
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}

‎tools/topology/topology2/include/components/eqiir/xover_lr4_2000hz_llhh_48khz.conf‎

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# LR4 filter bank coefficients 27-Aug-2025
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# cd src/audio/eq_iir/tune; octave sof_example_lr4.m
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Object.Base.data."IIR" {
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bytes "
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0x53,0x4f,0x46,0x34,0x00,0x00,0x00,0x00,
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0xcc,0x00,0x00,0x00,0x01,0xd0,0x01,0x03,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0xcc,0x00,0x00,0x00,0x04,0x00,0x00,0x00,
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0x02,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x01,0x00,0x00,0x00,
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0x01,0x00,0x00,0x00,0x02,0x00,0x00,0x00,
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0x02,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x2d,0x3a,0xcd,0xd3,
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0xc0,0xf5,0x82,0x68,0xb9,0x41,0x76,0x00,
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0x72,0x83,0xec,0x00,0xb9,0x41,0x76,0x00,
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0x00,0x00,0x00,0x00,0x00,0x40,0x00,0x00,
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0x2d,0x3a,0xcd,0xd3,0xc0,0xf5,0x82,0x68,
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0xb9,0x41,0x76,0x00,0x72,0x83,0xec,0x00,
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0xb9,0x41,0x76,0x00,0xff,0xff,0xff,0xff,
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0x65,0x7f,0x00,0x00,0x02,0x00,0x00,0x00,
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0x02,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x7e,0x70,0xdd,0xd6,
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0xc0,0xf5,0x82,0x68,0xb6,0x9e,0x44,0x1a,
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0x94,0xc2,0x76,0xcb,0xb6,0x9e,0x44,0x1a,
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0x00,0x00,0x00,0x00,0x00,0x40,0x00,0x00,
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0x7e,0x70,0xdd,0xd6,0xc0,0xf5,0x82,0x68,
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0xb6,0x9e,0x44,0x1a,0x94,0xc2,0x76,0xcb,
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0xb6,0x9e,0x44,0x1a,0xfe,0xff,0xff,0xff,
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0x92,0x41,0x00,0x00"
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}

‎tools/topology/topology2/include/components/micsel/xover_selector_lr_to_llrr.conf‎

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# Exported with script sof_selector_blobs.m 27-Aug-2025
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# cd tools/tune/selector; octave sof_selector_blobs.m
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Object.Base.data."selector_config" {
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bytes "
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0x53,0x4f,0x46,0x34,0x00,0x00,0x00,0x00,
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0x84,0x00,0x00,0x00,0x01,0xd0,0x01,0x03,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x04,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x04,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x04,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x04,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00"
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}

‎tools/topology/topology2/include/components/micsel/xover_selector_lr_to_lrlr.conf‎

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# Exported with script sof_selector_blobs.m 27-Aug-2025
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# cd tools/tune/selector; octave sof_selector_blobs.m
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Object.Base.data."selector_config" {
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bytes "
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0x53,0x4f,0x46,0x34,0x00,0x00,0x00,0x00,
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0x84,0x00,0x00,0x00,0x01,0xd0,0x01,0x03,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x04,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x04,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x04,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x04,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00"
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}

‎tools/topology/topology2/include/pipelines/cavs/mixout-gain-eqiir-eqfir-drc-micsel-eqiir-alh-dai-copier-playback.conf‎

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#
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# BE playback pipeline: mixout-gain-eqiir-eqfir-drc-micsel-eqiir-alh-dai-copier.
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#
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# All attributes defined herein are namespaced
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# by alsatplg to "Object.Pipeline.mixout-gain-eqiir-eqfir-drc-micsel-eqiir-alh-dai-copier-playback.N.attribute_name"
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#
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# Usage: mixout-gain-eqiir-eqfir-drc-micsel-eqiir-alh-dai-copier-playback pipeline object can be instantiated as:
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#
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# Object.Pipeline.mixout-gain-eqiir-eqfir-drc-micsel-eqiir-alh-dai-copier-playback."N" {
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# time_domain "timer"
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# }
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#
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# Where N is the unique pipeline ID within the same alsaconf node.
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#
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<include/pipelines/cavs/mixout-gain-eqiir-eqfir-drc-alh-dai-copier-playback.conf>
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<include/components/micsel.conf>
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Class.Pipeline."mixout-gain-eqiir-eqfir-drc-micsel-eqiir-alh-dai-copier-playback" {
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SubTreeCopy.baseclass {
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# this class extends the pipeline class.
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source "Class.Pipeline.mixout-gain-eqiir-eqfir-drc-alh-dai-copier-playback"
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# target node is not defined which means that the new subtree will be copied to
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# the parent node containing the SubTreeCopy node i.e in this case the
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# Class.Pipeline.mixout-gain-eqiir-eqfir-drc-micsel-eqiir-alh-dai-copier-playback {} node.
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# default copy type is to extend the base class ie the widgets and routes
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# will be added to the existing list of widgets/routes in the base class
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tree {
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Object.Widget {
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micsel."1" {
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num_input_audio_formats 1
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Object.Base.input_audio_format [
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{
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in_bit_depth 32
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in_valid_bit_depth 32
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}
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]
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num_output_audio_formats 1
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Object.Base.output_audio_format [
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{
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out_channels $SDW_AMP_NUM_CHANNELS
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out_bit_depth 32
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out_valid_bit_depth 32
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}
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]
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Object.Control {
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bytes."1" {
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IncludeByKey.SDW_AMP_XOVER_SELECTOR_PARAMS {
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"default" "include/components/micsel/passthrough.conf"
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"xover_selector_lr_to_llrr" "include/components/micsel/xover_selector_lr_to_llrr.conf"
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"xover_selector_lr_to_lrlr" "include/components/micsel/xover_selector_lr_to_lrlr.conf"
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}
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}
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}
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}
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eqiir."2" {
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num_input_audio_formats 1
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Object.Base.input_audio_format [
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{
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in_channels $SDW_AMP_NUM_CHANNELS
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in_bit_depth 32
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in_valid_bit_depth 32
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}
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]
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num_output_audio_formats 1
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Object.Base.output_audio_format [
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{
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out_channels $SDW_AMP_NUM_CHANNELS
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out_bit_depth 32
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out_valid_bit_depth 32
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}
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]
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Object.Control.bytes."1" {
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IncludeByKey.SDW_AMP_XOVER_EQIIR_PARAMS {
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"default" "include/components/eqiir/passthrough.conf"
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"xover_lr4_2000hz_lhlh_48khz" "include/components/eqiir/xover_lr4_2000hz_lhlh_48khz.conf"
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"xover_lr4_2000hz_llhh_48khz" "include/components/eqiir/xover_lr4_2000hz_llhh_48khz.conf"
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}
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}
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}
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}
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Object.Base {
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!route [
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{
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source drc.$index.1
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sink micsel.$index.1
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}
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{
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source micsel.$index.1
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sink eqiir.$index.2
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}
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]
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}
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}
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}
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}

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