doc: comprehensive modernization of developer guides, toolchain architectures, and release catalog

.wokeignore

@@ -16,11 +16,9 @@ contribute/process/bug-tracking.rst
 contribute/process/images/*
 getting_started/setup/setup_up_2_board.rst
 developer_guides/setup_special_device/setup_up_2_board.rst
-developer_guides/virtualization/virtualization.rst
 developer_guides/firmware/component-tutorial/tut-ii-topology.rst
 developer_guides/subsystem_architecture/host/linux_driver/architecture/sof_driver_arch.rst
 developer_guides/tech/compile_wsl.rst
-developer_guides/virtualization/files/q-v6.sh
 developer_guides/topology/topology.rst
 developer_guides/fuzzing/testbench_afl_fuzzing.rst
 

architectures/index.rst

@@ -605,6 +605,9 @@ At the heart of the firmware is the audio processing pipeline framework:
        ctl_eq -> comp_eq [style=dashed, color="#d35400", label="IPC Set Data"];
    }
 
+.. seealso::
+   For an in-depth architectural explanation of how pipelines, modules, Low-Latency (LL) and Data Processing (DP) scheduling domains, circular buffers, lifecycle management, and the runtime state machine operate, see the :ref:`pipeline_architecture` developer guide.
+
 Topology 2 Architecture
 =======================
 

data/modules.yaml

@@ -50,6 +50,22 @@ modules:
       - "Continuous clock drift tracking"
       - "Decoupled clock domain bridging"
 
+  - id: dmic
+    name: "Digital Microphone (DMIC) Decimation & Array Tuning"
+    source: "SOF"
+    category: "Foundational DSP"
+    status: "Upstream"
+    tuning_guide: "developer_guides/tuning/dmic_tuning"
+    description: "Hardware PDM ingress, 5th-order CIC comb decimation, multirate FIR droop compensation, DC-offset compensation, and multichannel array acoustic calibration."
+    simd: ["Hardware Accelerator", "Scalar C"]
+    key_features:
+      - "5th-order Cascaded Integrator-Comb (CIC) filter with up to 31x decimation"
+      - "Multirate droop-compensating FIR filters with passband ripple < 0.1 dB and stopband > 90 dB"
+      - "Dual-FIFO mode matching for concurrent 48 kHz communications and 16 kHz wake-on-voice"
+      - "Acoustic sensitivity calibration and inter-channel gain trimming for beamforming arrays"
+      - "Automated logarithmic unmute gain ramping eliminating stream start pops"
+      - "Standalone Python calibration CLI (sof_dmic_tool.py) and ACPI NHLT / Topology 2 integration"
+
   - id: demux
     name: "Audio Demux"
     source: "SOF"
@@ -86,6 +102,31 @@ modules:
       - "Mono to stereo/surround replication"
       - "Channel swap and mute masking"
 
+  - id: level_multiplier
+    name: "Level Multiplier"
+    source: "SOF"
+    category: "Basic Routing & Level"
+    status: "Upstream"
+    description: "Ultra-low-latency Q9.23 linear scaling amplifier for capture sensitivity calibration and inter-stage matching."
+    simd: ["HiFi 3", "HiFi 4", "HiFi 5", "Scalar C"]
+    key_features:
+      - "High-precision Q9.23 fixed-point multiplier (-138.47 dB to +48.17 dB)"
+      - "Zero-overhead fast-path bypass when configured for unity gain (0 dB)"
+      - "Runtime IPC4 calibration and LLEXT dynamic module packaging"
+    tuning_guide: "developer_guides/tuning/level_multiplier_aria_tuning"
+
+  - id: up_down_mixer
+    name: "Up/Down Mixer"
+    source: "SOF"
+    category: "Basic Routing & Level"
+    status: "Upstream"
+    description: "Configurable matrix-based channel upmixer and downmixer with per-coefficient attenuation."
+    simd: ["HiFi 3", "HiFi 4", "HiFi 5", "Scalar C"]
+    key_features:
+      - "Matrix coefficients for stereo, surround 5.1, and 7.1 mapping"
+      - "Channel energy normalization and clipping prevention"
+      - "Zero-copy passthrough when channel geometry matches"
+
   - id: tone
     name: "Tone Generator"
     source: "SOF"
@@ -123,6 +164,19 @@ modules:
       - "Parametric peak, notch, low/high shelf"
       - "Low computational latency"
 
+  - id: aria
+    name: "Aria (Automatic Regressive Input Amplifier)"
+    source: "SOF"
+    category: "Audio Enhancement"
+    status: "Upstream"
+    description: "Dynamic pre-amplifier and lookahead peak limiter with 1ms algorithmic latency."
+    simd: ["HiFi 3", "HiFi 4", "HiFi 5", "Scalar C"]
+    key_features:
+      - "Target pre-amplification boost (0, 6, 12, 18 dB)"
+      - "Instantaneous regressive ducking to prevent 0 dBFS clipping"
+      - "1ms lookahead circular buffer and per-sample linear interpolation"
+    tuning_guide: "developer_guides/tuning/level_multiplier_aria_tuning"
+
   - id: drc
     name: "Dynamic Range Compressor (DRC)"
     source: "SOF"
@@ -171,17 +225,57 @@ modules:
       - "Sub-audible rumble attenuation"
       - "Near-zero phase distortion in audio band"
 
+  - id: phase_vocoder
+    name: "Phase Vocoder"
+    source: "SOF"
+    category: "Audio Enhancement"
+    status: "Upstream"
+    description: "Frequency-domain time-scale modification (0.5x to 2.0x speed) without pitch alteration."
+    simd: ["HiFi 3", "Scalar C"]
+    key_features:
+      - "Real-time Short-Time Fourier Transform (STFT) analysis & synthesis"
+      - "Variable speed scaling (0.5x to 2.0x) with exact GCD counter normalization"
+      - "Interactive phase re-anchoring and mono downmix optimization"
+
+  - id: stft_process
+    name: "STFT Process"
+    source: "SOF"
+    category: "Audio Enhancement"
+    status: "Upstream"
+    description: "Modular Short-Time Fourier Transform frequency-domain filtering and synthesis engine."
+    simd: ["HiFi 3", "Scalar C"]
+    key_features:
+      - "Multi-channel 32-bit forward and inverse FFT with COLA windowing"
+      - "Dual-domain processing: Cartesian complex and polar magnitude/phase"
+      - "Single contiguous buffer layout and zero-copy polar memory overlay"
+
   - id: smart_amp
-    name: "Smart Amp Protection"
+    name: "Smart Amp Protection (DSM)"
     source: "SOF"
     category: "Speaker Protection"
     status: "Upstream"
-    description: "Speaker protection algorithm monitoring voltage/current feedback to maximize loudness safely."
+    description: "Closed-loop dynamic speaker management monitoring real-time voltage/current (I/V) feedback to maximize loudness and prevent mechanical and thermal destruction."
     simd: ["HiFi 3", "HiFi 4", "Scalar C"]
     key_features:
-      - "Real-time voice coil temperature estimation"
-      - "Membrane excursion limiting"
-      - "Maximizes acoustic output without damage"
+      - "Real-time voice coil temperature estimation via continuous Re(t) tracking"
+      - "Nonlinear membrane excursion prediction and adaptive high-pass limiting"
+      - "Closed-loop hardware I/V sense feedback via SoundWire and I2S/TDM"
+      - "Two-layer modular architecture supporting Maxim DSM and vendor engines"
+      - "Live runtime parameter injection and telemetry readback via sof-ctl"
+
+  - id: sound_dose
+    name: "Sound Dose & Exposure"
+    source: "SOF"
+    category: "Speaker Protection"
+    status: "Upstream"
+    description: "Auditory health monitoring and cumulative sound exposure limiter complying with IEC 62368-1 Clause 10.6, EN 50332-1/-2/-3, and WHO-ITU H.870."
+    simd: ["HiFi 3", "Scalar C"]
+    key_features:
+      - "IEC 61672-1 Class 1 A-weighting cascaded Direct Form I IIR biquad filtering"
+      - "Overflow-proof 64-bit real-time energy accumulation and integer base-2 logarithm decibel conversion"
+      - "Autonomous 1-second asynchronous IPC4 notification dispatch without host polling"
+      - "Smooth per-frame exponential slew gain limiter (0.05 dB/frame) eliminating clicks and pops"
+      - "Acoustic laboratory HATS calibration, rolling 7-day CSD tracking, and runtime control via sof-ctl"
 
   # --- Voice, Telephony & Speech ---
   - id: tdfb
@@ -292,7 +386,58 @@ modules:
       - "TFLite Micro runtime execution"
       - "Low false-reject and false-alarm rates"
 
+  - id: mfcc
+    name: "Mel-Frequency Cepstral Coefficients (MFCC)"
+    source: "SOF"
+    category: "Voice & Telephony"
+    status: "Upstream"
+    description: "Speech feature extraction engine computing triangular Mel filterbank energies, Slaney normalization, and DCT-II cepstra."
+    tuning_guide: "developer_guides/tuning/mfcc_tuning"
+    simd: ["HiFi 3", "HiFi 4", "Scalar C"]
+    key_features:
+      - "Configurable triangular Mel filterbanks (20 Hz to 8 kHz) with Slaney area normalization"
+      - "Dual-mode operation: 80-bin Mel spectrogram (Whisper ASR) or 13-cepstra MFCC (TFLM microWakeWord)"
+      - "Discrete Cosine Transform (DCT-II) with sinusoidal cepstral liftering"
+      - "Embedded Voice Activity Detection (VAD) and Discontinuous Transmission (DTX) silence suppression"
+      - "Sparse packed triangular filterbank vector storage with >95% SRAM memory reduction"
+
+  - id: mic_privacy_manager
+    name: "Microphone Privacy Manager"
+    source: "SOF"
+    category: "Voice & Telephony"
+    status: "Upstream"
+    description: "Hardware-enforced microphone capture mute and privacy state management."
+    simd: ["Scalar C"]
+    key_features:
+      - "Zero-sample hardware mute interlock"
+      - "GPIO privacy LED synchronization"
+      - "Host-independent privacy state enforcement"
+
+  - id: rtnr
+    name: "Realtek Neural Noise Reduction (RTNR)"
+    source: "Realtek"
+    category: "Voice & Telephony"
+    status: "Upstream"
+    description: "Deep neural network noise suppression engine isolating speech from non-stationary background noise."
+    simd: ["HiFi 4", "Scalar C"]
+    key_features:
+      - "Neural network recurrent inference"
+      - "Non-stationary transient acoustic noise suppression"
+      - "Dual-microphone directional voice enhancement"
+
   # --- Codecs & Compression ---
+  - id: media_codecs
+    name: "Media Codecs (Cadence XA & Compress-Offload)"
+    source: "SOF / Cadence"
+    category: "Codecs & Compression"
+    status: "Upstream"
+    description: "Hardware-accelerated compressed audio offload decoders and encoders using the Cadence Xtensa Audio (XA) standard."
+    simd: ["HiFi 3", "HiFi 4", "HiFi 5", "Scalar C"]
+    key_features:
+      - "ALSA compress-offload playback (MP3, AAC, Vorbis, PCM passthrough) and capture (MP3 enc)"
+      - "Standardized Cadence Xtensa Audio (XA) four-class memory tables and state machine"
+      - "Deep-buffer DMA host wakeup suppression enabling prolonged C10 deep sleep"
+
   - id: aac_dec
     name: "AAC Decoder"
     source: "FFmpeg"

data/platforms.yaml

@@ -22,7 +22,6 @@ platforms:
       - IPC3
     zephyr_target: intel_adsp_cavs25
     target_alias: tgl
-    test_dut: Spider
     status: Mainline Active
 
   - id: tgl_h
@@ -204,7 +203,6 @@ platforms:
       - IPC4
     zephyr_target: intel_adsp_ace15_mtlm
     target_alias: arl-s
-    test_dut: Dragon Fly
     status: Mainline Active
 
   - id: lnl
@@ -245,7 +243,6 @@ platforms:
       - IPC4
     zephyr_target: intel_ace30_ptl
     target_alias: ptl
-    test_dut: Aphid
     status: Mainline Active
 
   - id: wcl
@@ -618,9 +615,8 @@ platforms:
       - N/A
     zephyr_target: esp32p4
     target_alias: esp32-p4
-    test_dut: "Pallas (Tx) / Ceres (Rx) Loopback Pair"
     status: Active Integration
-    notes: "Essential test card for automated I2S/PDM loopback verification across Spider and Aphid"
+    notes: "Essential test card for automated I2S/PDM loopback verification across target DUTs"
 
   - id: esp32_c6
     vendor: Espressif

data/sof_bin_releases.json

@@ -1,4 +1,15 @@
 [
+  {
+    "tag_name": "v2026.09",
+    "name": "v2026.09",
+    "fw_version": "v2.15",
+    "published_at": "2026-09-17",
+    "html_url": "https://github.com/thesofproject/sof-bin/releases/tag/v2026.09",
+    "asset_name": "sof-bin-2026.09.tar.gz",
+    "asset_url": "https://github.com/thesofproject/sof-bin/releases/download/v2026.09/sof-bin-2026.09.tar.gz",
+    "asset_size_mb": 16.7,
+    "prerelease": false
+  },
   {
     "tag_name": "v2025.12.2",
     "name": "v2025.12.2",
@@ -119,16 +130,5 @@
     "asset_url": "https://github.com/thesofproject/sof-bin/releases/download/v2024.06/sof-bin-2024.06.tar.gz",
     "asset_size_mb": 9.4,
     "prerelease": false
-  },
-  {
-    "tag_name": "v2024.03",
-    "name": "v2024.03",
-    "fw_version": "v2.9",
-    "published_at": "2024-04-02",
-    "html_url": "https://github.com/thesofproject/sof-bin/releases/tag/v2024.03",
-    "asset_name": "sof-bin-2024.03.tar.gz",
-    "asset_url": "https://github.com/thesofproject/sof-bin/releases/download/v2024.03/sof-bin-2024.03.tar.gz",
-    "asset_size_mb": 7.8,
-    "prerelease": false
   }
 ]

developer_guides/algorithms/eq/equalizers_tuning.rst

@@ -3,6 +3,13 @@
 Equalizers, IIR and FIR
 #######################
 
+.. seealso::
+
+   For a high-level firmware architectural overview of both Finite Impulse Response (FIR)
+   and Infinite Impulse Response (IIR) equalizers—including transversal filter structures,
+   Direct Form I biquad cascades, parametric filter topologies, dynamic IPC blob swapping,
+   and SIMD acceleration—see :ref:`eq_fir_iir`.
+
 .. contents::
    :depth: 3
 

developer_guides/algorithms/src/sample_rate_conversion.rst

@@ -3,6 +3,13 @@
 Sample Rate Conversion
 ######################
 
+.. seealso::
+
+   For a high-level firmware architectural overview of both Synchronous (SRC) and
+   Asynchronous (ASRC) converters—including multi-stage factorization, continuous
+   Farrow drift compensation, push vs pull topologies, and SIMD acceleration—see
+   :ref:`src_asrc`.
+
 Introduction
 ************