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SoundConverter vs SoX: catalog facts
SoundConverter	SoX
Free Free and open source under the GPL-3.0 licence.	Free Free and open source under GPL-2.0 and LGPL licences.
Linux	Windows, macOS, Linux, Command line
Reads anything GStreamer supports Multithreaded batch conversion	Converts between many audio file formats Applies effects and filters during conversion
Linux and GNOME focused MP3 output depends on the GStreamer LAME plugin	Command line only, with no graphical interface Infrequent releases
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-2.0-or-later AND LGPL-2.1-or-later
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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