Teach Yourself Music Theory – 21.) Polyrhythms and Hemiolas

As you can see from the title, we are going to talk about some new concepts and add new vocabulary into our musical terminology usage.

Polyrhythm, is the juxtaposition of two different beat divisions happening at the same time. This will create an interesting composite rhythm of the combining beat divisions. Let’s take a look:

Above is a piece of music with a lot of beat divisions working together to create one polyrhythm. We can see that the C4 pitch is played on every down beat of the 3/4 measures, but the arpeggiation (breaking apart of a chord) of the C major triad below is in a division pattern similar to a 6/8 time signature. Play it out and you will hear it.

In the melody line, we see four notes in equal length of a dotted eighth-note. Within the 3/4 time signature, we have four notes of even value going against the quarter-note pulses and 6/8 division grouping arpeggiation. So that too is another addition to the overall polyrhythm.

A hemiola, is similar to a polyrhythm in that it goes against the conventional beat division – but it is more defined of when normal groupings of three become groupings of two:

Here is another exaggerated version of a hemiola, going from odd to even groupings:

Thank you so much for taking the time to read! Feel free to comment, share, and subscribe for more daily tips below! Till next time.

Author: Bryan M. Waring

Bryan Waring is a graduate of USM's School of Music with a B.M. in Performance – Composition and is now attending Belmont University for a M.M. in Commercial Media – Composition & Arranging. During his time at USM, he studied violin with Dino Liva and composition with Dr. Daniel Sonenberg, as well as has premiered several pieces during the semiannual Composer's Ensemble concert series. In 2017, Bryan was a writer for the original musical theater work of "Molded By The Flow," directed by Paul Dresher and Rinde Eckert. Outside of school, Bryan has been involved with writing music for videogame developers at Portland's CI2 Lab, collaborating with the King Tide Party, and studying with Larry Groupé (Straw Dogs) in San Diego. Now living in Nashville. Along with composing, Bryan teaches music to children, receiving the Master Teacher Award for his work at ESF Camps; and does audio engineering for live ensembles. Besides talents in music, Bryan is a team-player in any competitive work environment; equipped with skills in leadership, organization, mathematics, creativity, communication, and managing. On the side, Bryan has worked as a model for several skilled artists in the New England area. Among his other accomplishments include obtaining the rank of Eagle Scout in April 2013 with a project of building a side parking area with guide rails for Webb Mountain Park in Monroe, CT.

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