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MasVisGtk vs Sonic Visualiser: catalog facts
MasVisGtk	Sonic Visualiser
Free Free and open source under GPL-2.0.	Free Free and open source. Hosting, hardware and any external services are separate.
Linux	Windows, macOS, Linux
Analyzes loudness using EBU R128 measurements Shows waveforms and frequency plots	Supports layered audio visualizations Works with analysis plug-ins
Designed for GNOME on Linux	Designed for analysis rather than multi-track music production.
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked September 22, 2026

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