From marconi
Systematically debugs DSP faults (silent audio, noise, wrong pitch) in GNU Radio receivers by inspecting spectrograms and checking one parameter per iteration.
How this skill is triggered — by the user, by Claude, or both
Slash command
/marconi:debug-no-signalThe summary Claude sees in its skill listing — used to decide when to auto-load this skill
A receiver that runs `status: ok` but produces silence or garbage has a DSP fault, not a crash. Find it systematically; do not randomly tweak parameters.
A receiver that runs status: ok but produces silence or garbage has a DSP fault, not a crash. Find it systematically; do not randomly tweak parameters.
spectrogram (and/or psd_plot) of the channelized capture — the stage right after freq_xlating_lowpass — and measure it. Most faults are visible there.center_offset value or its sign is wrong (center_offset = target_freq − capture_center_freq).quad_rate. Check sample_rate / decimation.cutoff below the signal bandwidth clips it (muffled/silent); far too wide lets in neighbors (noisy).measure the channelized capture: very low SNR means you channelized empty spectrum — re-check the target frequency from survey-spectrum.nbfm_rx, quad_rate must be an integer multiple of audio_rate; a wav_sink sample_rate must match the audio stream rate.npx claudepluginhub yoelbassin/gr-mcp --plugin marconiBuilds, validates, runs, and verifies a receiver pipeline for a target signal, then saves it as a reusable GRC flowgraph. Includes worked examples for NBFM voice and unmodulated carrier.
Pre-mix audio analysis and problem detection for audio engineering. Runs Phantom MCP diagnostic tools on stems, catalogs issues by severity (dealbreaker/significant/moderate/minor), identifies frequency masking between stems, and produces a structured mix brief. Use this skill whenever the user wants to analyze audio stems or files before mixing, diagnose audio problems (phase issues, clipping, noise, hum, mud, harshness), assess recording quality, prepare a mix session overview, check if a mix is ready for mastering, or investigate why something "sounds wrong." Also use when the user provides WAV file paths and asks for analysis, quality checks, or problem identification -- even if they don't explicitly mention "diagnostics."
Diagnoses gear faults from vibration signals using spectral analysis of GMF harmonics, sidebands, envelope demodulation, spectrograms, PSD, and ISO 20816 evaluation via predictive-maintenance-mcp server.