Add DFNR (DeepFilterNet3) AI noise reduction#977
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Integrate DeepFilterNet3 as a fifth client-side noise reduction option alongside NR2, RN2, NR4, and BNR. DeepFilterNet3 offers higher speech fidelity than RNNoise in high-noise HF environments, runs CPU-only with 10ms latency at 48kHz. Core: - DeepFilterFilter class (48kHz mono, accumulator-based frame processing, [-1,1] float normalization, configurable attenuation limit and post-filter) - AudioEngine: 5-way mutual exclusion, feedAudioData processing branch, thread-safe parameter setters, RADE/digital mode auto-disable - Bundled libdf C API header + DeepFilterNet3 ONNX model (7.7MB) UI: - DFNR button in VfoWidget DSP tab and SpectrumOverlayMenu panel - Right-click parameter popup (attenuation limit 0-100dB, post-filter beta) - DFNR tab in AetherDSP Settings dialog with tooltips - NR cycle keyboard shortcut extended: Off → NR → NR2 → NR4 → DFNR → Off - MIDI controller mapping (toggle + attenuation) Build: - setup-deepfilter.sh/ps1 download pre-built libraries from GitHub Release (tagged dfnr-libs), falling back to Rust source build if unavailable - CMakeLists.txt: HAVE_DFNR conditional, platform-specific link deps - CI workflows simplified: no Rust toolchain needed, ~150s savings per workflow - Dockerfile: add libssl-dev for future Rust needs Settings: ClientDfnrEnabled, DfnrAttenLimit, DfnrPostFilterBeta persisted via AppSettings. Band stack save/restore included. Resolves aethersdr#970 JJ Boyd ~KG4VCF 🤖 Co-Authored with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Integrate DeepFilterNet3 as a fifth client-side noise reduction option alongside NR2, RN2, NR4, and BNR. DeepFilterNet3 offers higher speech fidelity than RNNoise in high-noise HF environments, runs CPU-only with 10ms latency at 48kHz. Core: - DeepFilterFilter class (48kHz mono, accumulator-based frame processing, [-1,1] float normalization, configurable attenuation limit and post-filter) - AudioEngine: 5-way mutual exclusion, feedAudioData processing branch, thread-safe parameter setters, RADE/digital mode auto-disable - Bundled libdf C API header + DeepFilterNet3 ONNX model (7.7MB) UI: - DFNR button in VfoWidget DSP tab and SpectrumOverlayMenu panel - Right-click parameter popup (attenuation limit 0-100dB, post-filter beta) - DFNR tab in AetherDSP Settings dialog with tooltips - NR cycle keyboard shortcut extended: Off → NR → NR2 → NR4 → DFNR → Off - MIDI controller mapping (toggle + attenuation) Build: - setup-deepfilter.sh/ps1 download pre-built libraries from GitHub Release (tagged dfnr-libs), falling back to Rust source build if unavailable - CMakeLists.txt: HAVE_DFNR conditional, platform-specific link deps - CI workflows simplified: no Rust toolchain needed, ~150s savings per workflow - Dockerfile: add libssl-dev for future Rust needs Settings: ClientDfnrEnabled, DfnrAttenLimit, DfnrPostFilterBeta persisted via AppSettings. Band stack save/restore included. Resolves #970 JJ Boyd ~KG4VCF 🤖 Co-Authored with [Claude Code](https://claude.com/claude-code) Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Summary
Integrates DeepFilterNet3 as a fifth client-side noise reduction option (
DFNR), addressing the proposal in #970.DeepFilterNet3 is an AI-powered speech enhancement model that offers significantly higher fidelity than RNNoise (RN2) in high-noise HF environments. It runs CPU-only with ~10ms latency at 48kHz — no GPU required.
What's included
Core DSP:
DeepFilterFilterclass mirroring the RNNoiseFilter pattern (48kHz mono, 480-sample frames, accumulator-based I/O)DeepFilterNet3_onnx.tar.gz, 7.7MB) — bundled in build outputUI (follows NR4 pattern exactly):
Build system:
setup-deepfilter.sh(Linux/macOS) andsetup-deepfilter.ps1(Windows) — build libdf from Rust source viacargo-cHAVE_DFNRconditional compilation, platform-specific link deps, DLL + model post-build copyCI (all platforms):
AppDir/usr/bin/), macOS app bundle (Contents/MacOS/), and Windows deploy directorySettings persistence:
ClientDfnrEnabled,DfnrAttenLimit,DfnrPostFilterBetavia AppSettingsComparison with existing NR methods
Architecture notes
extern "C"). The setup scripts build it from source usingcargo-c, producing:libdeepfilter.a) linked directlydeepfilter.dll) — Rust static libs have CRT init issues with MinGWDeepFilterNet3_onnx.tar.gz) is loaded at runtime viaQCoreApplication::applicationDirPath()d375b2d8for reproducible buildsTest plan
-DENABLE_DFNR=OFFcompiles clean, no regressionsJJ Boyd ~KG4VCF
🤖 Co-Authored with Claude Code