4Front Bass VSTi 4Front Bass is a small single sound instrument without any settings that reproduces a timbre of a bass guitar. 4Front Bass is available as VSTi for Windows, and as an AudioUnit, VSTi and RTAS for Mac (see enclosed readme file). 4Front Bass is small on memory and CPU usage and was found useful by many users and software developers as a plug&play bass guitar module which does not require any configuration or adjustment. Info & Download >> yohng / 4Front Bass