gbozo/no-sdr v1.9.0 on GitHub

v1.9.0 Pre-release — Go Backend

This is the first pre-release of the Go backend (serverng). The Node.js backend has been retired to attic/.

Go backend replaces Node.js — same WebSocket binary protocol and REST API, client unchanged
Full demodulator parity: WFM stereo, NFM, AM, AM-Stereo (C-QUAM), SAM, SSB (USB/LSB), CW
Audio quality fixes: FM discriminator gain, WFM 51-tap FIR LPF, DC block + AGC for AM/SSB, correct de-emphasis (75µs WFM / 75µs NFM)
Bandwidth control: per-mode audio LPF on all demodulators (NFM/AM/SSB/SAM/CW)
Codec support: ADPCM IQ, raw IQ, Opus (mono/stereo), FFT deflate/ADPCM
Codec switching at runtime: IQ ↔ Opus switches without restart, stereo enable/disable respected
Race-free hot path: per-pipeline mutex (pmu) protects Opus pipeline pointer
FFT history panic fix: profile switch now resets history buffer; mixed-size frame guard added
Docker image: new multi-stage Dockerfile (Node client build + Go binary + Alpine runtime)

The server/ directory has moved to attic/server/ — it is no longer part of the npm workspace or build
npm run dev / npm run build now target the Go backend only; legacy scripts removed

docker pull ghcr.io/gbozo/no-sdr:1.9.0

Or use docker/docker-compose.yml for USB passthrough.