Through the thick melodic honey of Russian Romanticism and the ever-changing musical illusions of a contemporary American composition, the Quad City Symphony on December 7 fashioned a successful concert from two divergent approaches to lyricism. Although the symphony occasionally blurred the differences between melodies and their accompaniments, they achieved resplendent moments of uplifting splendor in both pieces.

The program paired Jennifer Higdon's imaginative, three-movement Violin Concerto - which won the 2010 Pulitzer Prize - with Sergei Rachmaninoff's profusely tuneful Symphony No. 2. Separated by a century of musical development, these works feature vast differences in compositional technique and tonality: Rachmaninoff worked in the customary symphonic form while Higdon writes improvisationally, and Rachmaninoff used traditional harmonic structure while Higdon employs a variety of tonal systems developed during the 20th Century.

But they are similar in using lyricism or songfulness as the primary means of self-expression. Consequently, in both cases, the artistic challenge for the Quad City Symphony was the same: to emphasize, with dynamics and stylistic nuances, melodic and motivic fragments and differentiate them from background sounds and accompaniment - a task the orchestra and its guest conductor struggled with in the first movement of Rachmaninoff and throughout Higdon.

There's a perfectly practical reason the Kansas-based band Müscle Wörship uses umlauts in its name - to protect people who would rather not know about a particular sexual fetish. So a word of advice to those folks: Don't do an online search for the band without those umlauts!

But the combination of a somewhat-deviant punk-ish name and those metal dots (à la Motörhead) makes musical sense, too, as Müscle Wörship lives in the cracks between styles. There's the lean aggression of punk, the experimental complexity of post-punk, the general heaviness of metal, extensive use of the tremolo bar that sometimes recalls the signature guitar sounds of both My Bloody Valentine and Neil Young, alternative tunings that bring to mind Sonic Youth, a grunge-y emphasis on hooks and distorted melody, and even hints of emo in the vocals.

The magic is that - on Müscle Wörship's self-titled debut album from earlier this year - those disparate elements have been combined in a way that, against all odds, is nearly monolithic: 32 furious minutes of great and nearly great infectious hard rock. (And just to be clear: The whole record is 32 minutes.) The group's music has three very different methods of persuasion - forceful enough to grab you by the throat, accessible enough to suck you in, and intricate enough to get lost in. In that sense, the name is wholly appropriate: This is music that's all beautifully sculpted muscle.

Jennifer Higdon's Violin Concerto unfolds as a slow burn with flickering, firefly-like tones, then straps you into a sonic roller coaster, corkscrewing through ever-changing musical images. When you have experienced the sublime disorderliness of Higdon's concerto, it seems miraculous that it ultimately makes sense; you have experienced something that was perceivable if not completely comprehensible.

The winner of the 2010 Pulitzer Prize for Music, Higdon's concerto could be bewildering for audiences at the Quad City Symphony's December 7 and 8 concerts, with its copious, fast-changing variations of instrumental combinations and dynamics: violin harmonics with small finger cymbals, tingling high woodwinds with low, growling cellos and basses, sudden changes in volume, and constantly contrasting textures of sound. The musical events might seem random at first, but somewhere in your brain, you should be able to recognize and reorganize them enough to get a sense of Higdon's complex yet stunningly accessible musical thinking.

With a diverse, rich sampling of chamber music in its second Masterworks concert of the season, the Quad City Symphony on October 26 provided sensitive musical insight into the personal lives of composers. No symphonies, concertos, or philosophical tone poems here; rather the program included instrumental music for the stage, and vocal music about relationships with family and friends. The performance was consistently strong throughout with a strange musical shuffle near the end that almost ruined the warm, cozy atmosphere the musicians worked so hard to create.

To "Concert Conversations" participants sitting in the Adler just before the program, Music Director and Conductor Mark Russell Smith explained that "in the old days, concerts were bookended by big works and filled in with bits and pieces of other works." Franz Schubert's Overture to Rosamunde and Richard Strauss' Suite from Le Bourgeois Gentilhomme might have been the "bookends" of the program, but the soul was found in the "bits and pieces" sung by guest soprano Sarah Shafer.