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MasVisGtkSpek
Free

Free and open source under GPL-2.0.

 Free

Free and open source under GPLv3.

Linux Windows, macOS, Linux
  • Analyzes loudness using EBU R128 measurements
  • Shows waveforms and frequency plots
  • Shows instantly whether a lossless-looking file was upconverted from a lossy source
  • Uses FFmpeg for decoding, so it opens the formats FFmpeg opens
  • Designed for GNOME on Linux
  • Development is quiet: the last release, 0.8.5, is from January 2023
  • It only views spectrograms; it cannot edit or convert anything
Downloadable app Downloadable app
Open source Open source
License: GPL-2.0 License: GPL-3.0
Not stated if an account is needed No account needed
Not stated if it works offline Works offline

Checked October 8, 2026

Checked September 20, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.