Publisher Desc.  The title of this work is a metaphor and it shouldn't be taken literally as a "concerto" for any specific instrument, although brass and metal percussion instruments are prominent. Ever since I can remember, "Rhythm & Blues" and "Rock & Roll" have had a strong influence in me musically. In like manner, this work utilizes a popular and common 4-part "street corner" harmonic progression as it's main recourse. The sonic material or theme that evolves from that is transformed and modified into various melodic, harmonic, rhythmic and/or timbre motifs. A surprise "feel good Rock" passage appears revealing another cultural phenomena that permeates in our socio-musical environment. This work questions the possibility of overcoming abstruse musical concepts in contemporary concert music. But at the same time, it is revolutionary in the sense that it dares to contradict and confront Eurocentric musical concepts with an accessible and unpretentious street gutted idiom.