Headphone Parametric EQ Calibrator

Headphone Parametric EQ Calibrator is a desktop acoustic frequency response compensation
designer, EqualizerAPO / AutoEQ profile editor, and calibrated audio renderer for Linux.
An independent Linux alternative to Sonarworks headphone calibration suites, it loads,
edits, and builds multi-band ParametricEQ .txt profiles, computes exact RBJ biquad
transfer functions from 20 Hz to 20 kHz with anti-clipping preamp headroom margins,
exports EasyEffects and PipeWire presets, and renders calibrated audio tracks.

Key Features:
- AutoEQ & EqualizerAPO ParametricEQ .txt Support: Parses and saves Preamp and PK, LSC,
HSC, LP, HP, and NO filter bands with exact center frequency (Fc), Gain (dB), and Q.
- Exact RBJ Biquad 20 Hz - 20 kHz Bode Plotter: Plots individual band curves, composite
magnitude compensation, phase response, and automatic anti-clipping preamp headroom.
- EasyEffects & PipeWire Preset Exporter: Generates ready-to-use EasyEffects JSON output
presets and PipeWire filter-chain configuration modules with normalized IIR coefficients.
- Batch Calibrated Audio Rendering & Spectral Verification: Renders audio files through
64-bit precision parametric filters into WAV, FLAC, MP3, or Opus and verifies real
before/after spectral band energy.

Disclaimer: This project is an independent open-source tool and is not affiliated with, sponsored by, or endorsed by Sonarworks.