SiGENTEST
by Decibel One
For macOS

SiGENTEST Signal Generator and Tester

Audio analyzer and SMPTE timecode tools for macOS, using your audio interface. Measures level, THD, frequency response and phase. Generates test tones and timecode files. Monitors and records live timecode with an error log. Analyzes timecode recordings against SMPTE ST 12-1:2014 and regenerates files that fail.

Download for macOS

Version 1.28.1 · macOS 14 or later · Automatic updates

Free for students, teachers and non-pro users. Paid work needs a license: see Pricing.

SiGENTEST Audio Analyzer on the Response tab — a calibrated magnitude and phase frequency-response sweep over an interface loopback, with the interface's own response divided out.
Audio Analyzer, Response tab: magnitude and phase over a loopback, with the interface calibrated out.
Swept THD + phase

Audio Analyzer

Level, spectrum, swept THD, and frequency and phase response over an interface loopback, with interface calibration.

Pass/fail path tests

Audio Path Qualifier

NPR notched noise, multitone TD+N and repeated-sweep stability tests for wireless links, codecs and networked audio. Checks latency against published wireless-mode specifications.

ST 12-1 QC

LTC File Analyzer

Offline QC against SMPTE ST 12-1:2014, with PDF or JSON reports.

LTC Monitor

Reads live timecode from an input, with an event log, WAV recording and automatic fault capture.

LTC Generator

SMPTE timecode at the standard rates, 23.976–30 fps, drop or non-drop, square or cable-safe edges.

Audio File Generator

Tones, noise, sweeps, IMD pairs and tone bursts, mono or multichannel, with a band-limited preview and WAV export.

SiGENTEST Audio Path Qualifier running the NPR notched-noise test — the live floor overlaid on a stored reference trace, with graded per-notch depth readouts of 79 to 147 dB.
Audio Path Qualifier: NPR notched-noise test over a loopback, each notch graded against a stored reference.
SiGENTEST LTC Monitor locked to incoming SMPTE timecode at 06:57:20:04, 30 fps non-drop, with a live biphase waveform, averaged spectrum, and an event log that caught a 5.9-second dropout.
LTC Monitor: live SMPTE timecode with biphase waveform, spectrum and a dropout event log.
Works offline
PDF and JSON reports
Automatic updates

All versions

Every version stays here after a newer one comes out.

  1. 1.28.125 September 2026 · macOS 14 or later · What’s new
    Download 7.5 MB