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Rubber Band LibrarySoX
Free

Free under the GPL, with a paid commercial licence available for developers who need other…

 Free

Free and open source under GPL-2.0 and LGPL licences.

Windows, macOS, Command line Windows, macOS, Linux, Command line
  • Changes tempo and pitch independently
  • Ready-made command-line executables for Windows and macOS
  • Converts between many audio file formats
  • Applies effects and filters during conversion
  • The command-line utility is basic, with no graphical interface
  • Mainly aimed at developers integrating the library
  • Command line only, with no graphical interface
  • Infrequent releases
Downloadable app Downloadable app
Open source Open source
License: GPL-2.0-or-later License: GPL-2.0-or-later AND LGPL-2.1-or-later
No account needed No account needed
Works offline Works offline

Checked October 2, 2026

Checked October 1, 2026

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