jack_mixer is a GTK JACK audio mixer app with a look similar to its
hardware counterpart. It has lot of useful features, apart from being
able to mix multiple JACK audio streams. It is licensed under GPL
version 2 (or later).
Changes in version 12?
* Added reporting of the current volume through SIGUSR1 signal to
* Reset color of over 0db/NaN peak on click.
* Fixed memory leaks.
* Fixed some Python 3 compatibility leftovers.
And there is now a GitHub project for your features, or feature
requests, bugs, etc. -> https://github.com/jack-mixer/jack_mixer
With contributions from Daniel Sheeler and Athanasios Silis, thanks!