LADSPA is an open source plugin format for Linux
Products:
A/B Tester x2 Stereo by LSP
A/B Tester x2 Stereo allows you to perform A/B tests around 2 stereo inputs with blind option.
A/B Tester x2 Mono by LSP
A/B Tester x2 Mono allows you to perform A/B tests around 2 mono inputs with blind option.