As any rock historian could tell you, teaming up with an orchestra can sometimes be a thin attempt to disguise a creative lag. But in the case of DeVotchKa and the Colorado Symphony, the pairing has produced an inspired, brilliantly structured melding of two aesthetics that relies less on contrast than it does on similarities. With DeVotchKa's sentimental landscapes and the Symphony's climactic rises and powerful, sweeping descents, performances make for a kind of epic storytelling, supplanted with enough heart to afford the grand housing of so many instruments without sounding bombastic. After offering a preview of the material at Boettcher Concert Hall, the players reconvened at Red Rocks last fall, and the results were captured for a live album, which was released in December.