Yoshimi
A Software synthesizer for Linux
A software synthesizer for Linux, originally forked from ZynAddSubFX (Copyright 2002-2009 Nasca Octavian Paul) in 2009 by Alan Calvert. Initially, Yoshimi delivered the same synthesizer capabilities. After early improvement of Jack and Alsa midi/audio performance, now many new features have been added, and we are concentrating on accessibility.
Yoshimi comes with a built-in User Guide, and there is also a highly detailed Advanced Reference Manual under continuous development: https://github.com/Yoshimi/yoshimi-doc/raw/master/pdf/yoshimi-advanced-reference-manual.pdf