Bass players have a significant role in controlling how harmony is perceived, so brush up on those fundamentals.
Following our “Walking Bass Crash Course,” I thought it would be useful to begin a companion piece on harmony for bassists. Harmony is a massive subject, so this will be one of a few. As I’ve told many students over the years, us bassists must exist between the worlds of rhythm, harmony, and melody. A true understanding will help you realize that these are really all the same thing, and the great master bassists of the past understood this.
Harmony is when individual things are in agreement. In ancient Greek, “harmonia” meant “agreement, concord of sounds,” or the optimal joining of things. Those things could be a group of people, planks of wood to make a ship, or nations of the world who get along. We’ll focus on tones in harmony. Take A, C, and E for example. It may seem obvious that these tones spell an A minor chord. However, long ago, before the science of harmony was well established, this was not so obvious.
There are two basic states within harmony: dissonance and consonance. Consonant sounds complement/reinforce each other, while dissonant sounds fight each other, creating an overall feeling of unrest. Any combination of notes will fall somewhere along this spectrum, and harmony is about balance, like light and shade in a painting.
There are 12 intervals that represent all the possible two-note combinations (dyads) within the octave: unison, minor/major second, minor/major third, perfect fourth, tritone, perfect fifth, minor/major sixth, and minor/major seventh.
Ear training:It’s important to train our ears to identify intervals instantly. Begin by choosing three intervals (unison, major third, and perfect fifth). Find a friend or an app to test yourself. Once you can identify these 95 percent of the time, add two more until you can identify all 12.
Harmony is really based on gravity, and the entire bass role is about reinforcing this.
Unison might be considered the most consonant interval, while a tritone (C to F# for example)and minor second (C to Db) might be the most dissonant. How dissonant depends on who we ask.
Consonance and dissonance are both related to real world physics via the overtone series, and psychosomatics via history and culture, or our exposure to certain sounds. I put more stock in the physics explanation. What we hear as a single note—the fundamental—is in fact an infinite number of upper partials (pitches), which together create what we perceive as a single tone. These partials are arranged in a series called the overtone or harmonic series. Expressed as comparative wavelengths, that looks like this: 1, 1/2, 1/3, 1/4, 1/5, 1/6, 1/7, 1/8, and so on. Expressed as pitches, that’s C, C, G, C, E, G, Bb, C, and so on.
Thus, taking into account all the partials involved when we combine two notes, we’re combining many notes. Each note’s partials vibrate in a manner which either reinforce or fight against the partials of the other note. The notes whose partials reinforce each other are the ones that are most consonant. Venturing further down the rabbit hole: Consonance is not based on overtone coincidence alone. It’s also based on the simplicity of the resulting ratio between two notes. Unison = 1:1, octave 1:2, fifth = 3:2, etc. (For a full explanation, see Hermann Helmholtz’s On the Sensations of Tone.)
The fifth has a very important role in harmony. People often confuse fourths with fifths. I’ll skip ahead and say the only difference between these intervals is which direction you’re going, and which note sounds like the root. The concept of “the root” is hard to explain in words. It’s a form of “harmonic gravity” that’s much easier to hear.
Exercise: Play C to F ascending and listen for which note sounds stronger—some might even say heavier or slightly louder. In most cases people will say F (the top note). Now, try the same with Fto C ascending. Most people will now hear the bottom note as dominant. Try to do the same with other fifths, and then other intervals. With all intervals, except for the tritone (more on that later), one note (the top or bottom) will consistently dominate the other, and you guessed it, once again the partials are to blame.
We could sum all this up by saying that harmony is really based on gravity, and the entire bass role is about reinforcing this. Bass instruments add weight to whatever is happening harmonically by focusing on roots and their progression. Walking bass, where we began a couple months back, is one form of this. Great bass players develop an amazing sense of where the gravity lies in any chord, or progression, and can instantly home in on it.
In the next installment, we’ll explore chord qualities, scales, modes, harmonic function, and more exercises.
- How to Become a Rhythmic Time Traveler ›
- A Walking-Bass Crash Course ›
- Flashy Is Fun, But the Bass Has a Deeper Function - Premier Guitar ›
Looking for more great gear for the guitar player in your life (yourself included!)? Check out this year's Holiday Gear Finds!
D'Addario XPND Pedalboard
DR-05X Stereo Handheld Recorder
Wampler Pedals Ratsbane
Outlaw Effects introduces their next generation of NOMAD rechargeable battery-powered pedal boards.
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Dunable announces new Minotaur model featuring Grover Rotomatic Keystone tuners.
The Minotaur's DNA is rooted in their classic Moonflower model, which Dunable discontinued in 2017. However, they have long since wanted to create a fresh take on a carved top guitar design, and various attempts to rework the Moonflower led them to a brand new concept with the Minotuar.
Dunable's goal is to give the player a guitar that plays fast and smooth, sounds amazing, and gives maximum physical ergonomic comfort. The Minotaur's soft and meticulous contours, simple and effective control layout, and 25.5" scale length are designed to easily meet this criteria.
- 25.5" scale length
- Dual Humbucker
- one volume, one tone, push pull for coil splitting
- Grover Rotomatic Keystone tuners
- Grover Tune O Matic bridge with brass Kluson top-mount tailpiece
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- 12" fretboard radius
This full-amp-stack-in-a-box pedal brings a new flavor to the Guitar Legend Tone Series of pedals, Missing Link Audio’s flagship product line.
Adding to the company’s line of premium-quality effects pedals, Missing Link Audio has unleashed the new AC/Overdrive pedal. This full-amp-stack-in-a-box pedal – the only Angus & Malcom all-in-one stompbox on the market – brings a new flavor to the Guitar Legend Tone Series of pedals, Missing Link Audio’s flagship product line.
The AC/OD layout has three knobs to control Volume, Gain and Tone. That user-friendly format is perfect for quickly getting your ideal tone, and it also offers a ton of versatility. MLA’s new AC/OD absolutely nails the Angus tone from the days of “High Voltage” to "Back in Black”. You can also easily dial inMalcom with the turn of a knob. The pedal covers a broad range of sonic terrain, from boost to hot overdrive to complete tube-like saturation. The pedal is designed to leave on all the time and is very touch responsive. You can get everything from fat rhythm tones to a perfect lead tone just by using your guitar’s volume knob and your right-hand attack.
- Three knobs to control Volume, Gain and Tone
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