VST instruments include software simulation emulations of well-known hardware synthesizers and samplers. Robinson stated that he used soundfonts, which are low-quality emulations of real-life instruments. As digital keyboard technology has advanced, the quality of clavinet emulations has improved. Roland released the first official software emulations of the 808 and 909 in 2018. JED's Emacs mode is one of the most faithful emulations available. These "transplants" can look like almost any popular guitar, yet produce all the Variax emulations. Using the host's window allows one to pipe output between emulations. Several unlicensed emulations in English have been attempted. Critics have described these games as "perfect emulations". Many questions arise regarding the legal personhood of emulations. Today it can still be used on SIMH emulations of the PDP-10. In addition, the resulting animal emulations themselves might suffer, depending on one's views about consciousness. The Western lineup consisted of emulations of games and pay-to-play apps.