gem 1:0.93.3-10 (amd64 binary) in ubuntu zesty

 Gem is a loadable library for Pure Data (Pd), which adds OpenGL graphics
 rendering and animation to Pd. Pd is a graphical programming language and
 computer music system.
 .
 This package contains the core library.
 If you want to use external data (live video capture, film footage, still
 images,...), you have to install one (or all) of the gem-plugin-* packages.