zynaddsubfx-dssi 3.0.5-2build1 (amd64 binary) in ubuntu focal

 A real-time software synthesizer for Linux and Windows with many
 features, including polyphony, multi-timbral and microtonal
 capabilities. It includes randomness of some parameters, which
 makes warm sounds, like analogue synthesizers.
 It has system/insertion effects too, and much more.
 .
 This package provides a dssi plugin of zynaddsubfx.