Audio Signal and Distortion Analyzer (audio-thd-analyzer)
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Details for Audio Signal and Distortion Analyzer
Package name
- audio-thd-analyzer
License
- MIT
Last updated
- Today - latest/stable
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Calibration tone synthesizer and FFT THD, SNR & crosstalk audio analyzer
Audio Signal and Distortion Analyzer is a desktop acoustic measurement, calibration tone generator, and harmonic spectrum workbench for Linux. A lightweight Linux alternative to RightMark Audio Analyzer for evaluating audio files, loopback captures, and codec fidelity with precision spectral metrics.
Key Features:
- Precision Calibration WAV Synthesizer: Generates bit-exact 16-bit and 24-bit PCM WAV calibration signals at 44.1 kHz, 48 kHz, and 96 kHz including 1 kHz reference sine, 60 Hz + 7 kHz SMPTE twin-tone IMD, 20 Hz to 20 kHz logarithmic sweep, white noise, and dual-channel stereo crosstalk test probes.
- Multi-Format Audio Decoding: Reads uncompressed PCM WAV directly and decodes FLAC, MP3, Ogg Vorbis, Opus, AAC, and M4A audio files via bundled FFmpeg into floating-point frames.
- Windowed Radix-2 FFT Distortion Metrics: Applies a 4-term Blackman-Harris window with Welch spectral averaging to compute Total Harmonic Distortion (THD % and dB), THD+N (dB), Signal-to-Noise Ratio (SNR dB), Dynamic Range, Peak and RMS dBFS, Crest Factor, DC Offset, and Stereo Crosstalk (dB).
- Harmonic Spectrum Plot & Lab Reports: Renders an interactive logarithmic frequency spectrum with H1 through H10 harmonic markers and exports HTML, CSV, and JSON lab reports.
Disclaimer: This project is an independent open-source tool and is not affiliated with, sponsored by, or endorsed by RightMark Gathering.
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The build and commit information is derived from build infrastructure records.
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