Detect non-stationary tonal components — then ship a verified DSP design + PDF.
SignalForge is an offline desktop tool for deterministic noise/tonal analysis and DSP filter design. It supports non-stationary tones (drift / intermittent presence) using an STFT + threshold + presence evidence chain, so results are reproducible and explainable.
Pricing: perpetual license per major version. First-year service included; optional service from year 2: $$45$$/year.
design.json + C export for handoff.
Use cases
Works for audio, vibration, sensors, and general time-series—especially when you need analysis + filter design + documentation.
Non-stationary tonal issues
Detect drifting/intermittent tones with STFT evidence plus threshold and presence rules.
Noise reduction + verification
Quantify improvements with consistent metrics and verification plots you can show in reviews.
Design handoff
Export a full design as design.json and deploy coefficients via C export.
Core features
Focused on analysis, design, verification, and deliverables.
- PSD + STFT time-frequency analysis
- Non-stationary tonal detection using a combined rule set (threshold + presence)
- Diagnostics: thresholds, noise-floor estimates, candidate evaluation
- System health checks (e.g., clipping, DC offset, duration adequacy)
- Design IIR notch filters (frequency/Q) and FIR low-pass from specs
- Verification plots (e.g., step response, attenuation masks)
- Save designs as
design.jsonfor reproducibility - Export coefficients as C headers/source for embedded deployment
Non-stationary tonal PDF report (what you actually get)
When tones drift or appear intermittently, SignalForge documents the full evidence chain (STFT + thresholds + presence), then turns it into actionable filter designs and a professional PDF you can ship.
Time-frequency evidence
STFT-based plots show how tonal components evolve over time (drift / intermittent presence).
Traceable detection rules
Includes thresholds, noise-floor estimates, and presence criteria so results are reproducible and explainable.
Design + verification
Notch recommendations (with reasons), filter design summary, and verification plots (e.g., step response, attenuation masks).
Outputs
Deliverables built for handoff, repeatability, and deployment.
PDF report
Professional documentation: inputs, parameters, diagnostics, figures, and verification results.
design.json
A portable artifact capturing the full design intent and parameters for reproducibility and sharing.
C export
Export coefficients as C headers/source files for embedded pipelines and production use.
Pricing
One-time license per major version, with optional annual service & maintenance from year 2.
- 14-day free trial
- Offline use (no continuous internet)
- Local activation (no account required)
- First-year service & maintenance included
- Optional service & maintenance from year 2: $$45$$/year
Recommended trial behavior (best for conversion): after 14 days, keep analysis viewable but disable professional outputs
(PDF export, C export, and saving design.json).
- Import: WAV, CSV
- Export: PDF report,
design.json, C headers/source
FAQ
Short answers that reduce download/purchase friction.
Does SignalForge require an internet connection?
No. It runs offline. Activation does not require continuous internet.
Do you upload or collect my signal data?
No. SignalForge runs fully offline and does not collect user data.
How do you detect non-stationary tones?
SignalForge uses STFT time-frequency evidence and evaluates candidates using a combined rule set: thresholds (e.g., SNR/prominence) plus presence criteria (minimum time presence fraction).
What happens after the 14-day trial ends?
Recommended: keep analysis and report viewing available, but disable professional exports
(PDF export, C export, and saving design.json).
What do I actually receive after purchase?
A perpetual license key for the current major version. Service & maintenance is included for the first year; from year 2 it is optional at $$45$$/year.
Where can I read your policies?
Help & Support
Contact: [email protected] · Policies: Terms · Privacy · Refund