Unlike many other musical styles, jazz stands out as a genre that can easily tap into the deep crevices of the mind, digging up deeply held emotions and feelings. Stylistically, it is ready to express many ideas at once, to reveal the subtle feelings and nuanced thoughts that aren't always seen at the surface.

Most modern jazz musicians recognize this, and with this knowledge comes the challenge to move listeners in deep, meaningful ways. Any true jazz fan knows that jazz is not just here to entertain or create pretty sounds (in fact, a lot of jazz isn't too pretty), but that it is here to express and reflect the inner movements and expressions of the mind.

Which brings jazz musician Drew Gress into the conversation, a man who truly knows how to use each instrument and every improvisational technique to the greatest emotional effect. In his latest, The Irrational Numbers, Gress knows that his bass-driven jazz digs deep into, as Jack Kerouac said in his novel On The Road, the "pit and prune juice " of the human experience. The Irrational Numbers does just this, taking its listeners on a complex journey of highs and lows experienced at the peaks of mountains and the crevices of caves.

At first listen, The Irrational Numbers is hard to take in, bringing in equal amounts of dissonance and beautiful melodies. Every musician goes off on their own improvisational techniques, digging deep into their own personal feelings in order to bring together the group as a whole. At times, Gress' sound becomes jangled and discordant, but just as he goes off on a tangential riff, he brings the group back to a more unified, conventional sound.

The album starts off with "Bellwether," a short introductory song that highlights the more subdued elements of the rest of the album. With Ralph Alessi's muted trumpet and Gress' bass motifs carrying the rhythm and melody, "Bellwether" is a way for the band to say "we're here" and for the listener to wake up.

Once Gress has us listening attentively with "Bellwether," he gets right into it with "Chevelle," a fast moving and, at times, dissonant song that brings in the whole band. "Chevelle" begins with pounding beats and discordant piano chords. When the horns come in, there is a frantic pace, as each musician improvises on top of the riffs holding the rhythm together, including Gress' bass (here, Gress takes a step back, letting the other musicians take solos). Eventually, "Chevelle" breaks through the madness, and comes to a more conventional jazz technique. At the end, the piano (along with Gress' electronic instruments) brings the rest of the band back down to a beautiful, ethereal moment on the album.