Yoshimi is a software synthesizer for Linux based on the 2.4.0 release of ZynAddSubFX, written by Nasca Octavian Paul. Yoshimi delivers the same synth capabilities, along with very good Jack and Alsa midi/audio functionality.
I've been a ZynAddSubFX lover pretty much since it was first offered. Sadly though, Zyn has long been a case of flawed genius. It's audio and midi capabilities have not kept pace with the evolution and infrastructure improvements of Linux audio.
Performance with Jack was poor. Of recent years I've become more demanding in that respect, so I started looking at the code. I tried working with the official project team, but it proved impossible. We have vastly different and somewhat incompatible design, development and performance philosphies.
And so Yoshimi came to be, as a Linux only derivative of ZynAddSubFX. Yoshi attempts to do everything original Zyn does, but to do it well on Linux. A number of people have given time and energy to bring Yoshimi to life (and keep it that way!). My thanks go to you all.