Sampled from a Strinberg viola caipira, this instrument sounds like the 12 String Guitar, except, it is a little higher. Very common in Brazilian country songs, it's a beautiful and harmonious instrument.
This instrument has three round-robins and a velocity modulated cutoff (instead of velocity layers). The FX Chain is only applied to the last string, for giving more realism. Plus, there is a noise zone for the muted strum.
There is no programmed strum in this instrument, but is easily done using the delay function of Renoise.
Listen to Acoustic Work to see it in action.