Based on the physical modeling synthesis engine of the Strum Acoustic GS-1, Strum Acoustic Session is a simple and straightforward instrument reproducing nylon and steel acoustic guitars. It includes an elaborate voicing module which automatically voices chords played on the keyboard as a guitar player would on the fretboard. Strumming and picking actions are reproduced by an auto-strum function, special strumming keys or MIDI loops. An EQ and a reverb module complete the package.