OpenMeters – A fast and free audio metering/visualization suite

Name: OpenMeters – A fast and free audio metering/visualization suite
Availability: InStock
Author: httpsworldview

by httpsworldview·Mar 9, 2026·16 points·0 comments

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Spectral reassignment spectrogram plus multi-band correlation metering—pro tools quality, free and Linux-native.

Strengths

•Spectral reassignment method delivers exceptional time-frequency resolution beyond standard FFT approaches.
•Six distinct visualizations (spectrogram, spectrum, waveform, oscilloscope, stereometer, loudness) with ITU-R BS.1770-5 LUFS standard.
•PipeWire integration enables zero-overhead per-app and per-device audio capture without external routing.

Weaknesses

•Linux-only severely limits addressability; Windows and macOS users cannot use this despite demand for open audio metering.
•No documented performance benchmarks; claimed 'fast' lacks CPU/latency data against comparable tools like Loudness Penalty or LUFS.js.

Post Description

This has been a pet project of mine for the past ~5 months. It consists of six visualizations:

- Spectrogram: Implements the reassignment method for sharper time and frequency resolution. - Spectrum analyzer: A-weighted, frequency guidelines, loudest frequency tooltip. - Waveform: Colored based on frequency, loudness, or static - Oscilloscope: Tracks pitch and autocorrelates against a reference signal, provides stability. Also includes a regular zero-crossing trigger. - Stereometer & Phase meter: Linear and exponential scaling modes, adjustable windows. Multi-band correlation meter. - Loudness (LUFS & RMS): Implements the latest lufs standard. Adjustable timeframes.

Let me know what you think, and give it a star if you think it deserves as much. :] (check out the readme for a more complete enumeration of its features. Currently only available on Linux.)