Mourning Mist for Guitar and String Quartet by Joseph M Russo. The guitar adds a nice rhythmic and harmonic effect here as it shifts between melodic and harmonic sections.
Video Link: http://youtu.be/QGTYGzBnD1E
World Premiere Performance of Russo quintet: Mourning Mist for Guitar and String Quartet — at Long Island (NY) Guitar Festival on March 20, 2013
Composer: Joseph M Russo
Guitarist & Director of Festival: Harris Becker