What's new

Release history — the full changelog also lives in CHANGELOG.md.

1.0.3 2026-07-04

Notch-filter tuning module. Live tuning of a passive twin-T notch: a continuously looping log-sweep tracks the null in real time — its power-of-two period makes the transform shift-invariant, so no trigger is needed — and the notch's own response is then saved as a .frc calibration for de-embedding.
DAC pre-distortion calibration. A closed-loop wizard that iteratively cancels the converter's own harmonics (and dual-tone IMD), pushing the playback chain's distortion far below what the DAC produces alone.
Web version. A browser port of the analyzer — FFT, oscilloscope and signal generator — running with no install in the web version.
Oscilloscope. Rectangular rubber-band zoom with Ctrl+Z rollback, and a glitch trigger backed by a signal-discontinuity gate.
Documentation. Expanded Theory of operation (tune-notch measurement, ADC characterisation, adaptive mains cancellers, digital-phosphor persistence) and the ALGORITHMS.md engineering catalogue; this landing site.

Oscilloscope. Whole-period integration for V_mean/V_rms (removes the partial-cycle scatter that grew with amplitude); exact horizontal pan/zoom positioning.

Oscilloscope digital-phosphor persistence (GPU path) with off / fixed / infinite / manual decay modes.
Scope pan/zoom engine with connected-envelope rendering.
Microsoft Store (MSIX) packaging and Store listing assets.

First public release candidate: FFT analyzer (THD, THD+N, IMD, SNR, SINAD, ENOB, per-harmonic readout, coherent averaging, selectable windows, .frc calibration), oscilloscope, frequency response (Farina log-sweep deconvolution), signal generator (DDS), and multi-backend audio (WASAPI & WDM-KS on Windows, CoreAudio on macOS, JavaSound on Linux).