Guitar Pedals Expert Guide

Effects pedals are the key to unlocking a whole treasure trove of sounds you didn’t know you could create. Along with guitar amps, a sound knowledge of what pedals do (and how to fit them together) will make you a better guitarist and musician in general. Besides, who wouldn’t want to know how to recreate the amazing sounds of Hendrix or Jeff Beck?
 
While there are some good multi-effect pedals out there that give you a variety of sounds, in this article we’re going to look at the best ‘single-use’ guitar pedals and explain what each one does.
 
We’ve grouped them into four categories which broadly follow the order you should chain them up (for a diagram on how to hook them up, jump to the end of this article).
 
The four categories are:
  • Dynamic, Filters and Pitch
  • Gain Based
  • Modulation
  • Time-Based

Ready to dive in? Let’s get started.

Dynamic, Filters and Pitch Effect Pedals

COMPRESSOR

The compressor pedal ‘normalizes’ the dynamic range of the signal. In other words, it allows a string that is plucked lightly or heavy to sound the same, therefore smoothing out your overall tone.
 
It’s an effect that is used nearly universally in recording; the main advantage lies in the fact that every single note played by the guitarist will be played at almost the same amplitude, and thus roughly equal in volume. This allows tones that might otherwise have been lost in the mix (due to complex overtones) to be made audible — resulting in a more precise and articulate sound.
 
Compressor pedals should go at the end of your pedal chain, after all of the other effects. This will reduce the differences in volume between any other pedals that you use, and make your playing clearer and more smooth.
 

It’s worth noting that a compressor pedal for guitar won’t necessarily work as a bass guitar compressor, and vice versa. Both types of compressor share similar features, but there are two key differences. A bass compressor deals with lower frequencies. Therefore the range is smaller than you’d find on a guitar compressor. Also, bass compressors have more controllability on the attack than guitar compressors.

WAH

Any time you hear guitarists discussing pedals, this one comes up. Most notably played by Jimi Hendrix, and more recently on The Stone Rose’s Manchester anthem ‘Fools Gold,’ it’s sound has infiltrated rock guitar of the last fifty years. So much so, that not having one is a bit like not having a smartphone today. You don’t need one as such, but it’d be sort of weird not to.

Developed in the 1960s the wah is an augmentative device. The wah (or ‘wah-wah’) pedal has two basic positions—the open position, in which the guitarist has his/her heel to the ground; and the closed position, in which the toe is depressed to the ground.
Think of the open position as the “W” sound, and the closed position as the “H” sound. When depressed and released slowly, the Wah sweeps through a filter as you rock back and forth between open and closed, creating a slow, sweeping effect. And when the wah is rocked back and forth rapidly, the signature “wah-wah” sound is produced.
 

OCTAVE

The octave pedal mixes the input signal with an artificially synthesized one that is exactly an octave lower or higher than the original tone (known as an ‘octave-down’ or ‘octave-up.’) The effect is made possible due to the simple 2-1 relationship between the frequencies of musical notes, which are separated by an octave.

One of the first musicians to apply the octave effect was the great Jimi Hendrix, who bounced back and forth between octave and fuzz to create an effect known as “Octavia.”

ENVELOPE FILTER

Featuring heavily in the 1970s by Jerry Garcia (among others) to get that ‘guitar mutron’ vibe, and equally great for getting a solid funk tone too, envelope filters are a little bit like the wah above in that they directly change the sound of your instrument by altering the frequency of the signal.

Modulation Effects Pedals

FLANGER

Flangers divide opinion (some love them, others loathe them). They create an effect that mixes two identical signals. The result is a swept “comb filter” noise. Flanger pedals allow you to produce a variety of these time delays, which causes them to sweep up and down the frequency spectrum.

PHASER

Also known as phase shifters, the phaser is a modulation effect used to impose a resonant, ethereal swirl to your sonic palette. Players in many different genres use these wonderfully versatile pedals and add an ‘iridescent’ quality to your tone.

UNIVIBE

The univibe pedal is a unique sounding effect; a combination of phaser, chorus, vibrato, and flanger all rolled into one that produces a sound that isn’t readily identifiable as being any of these. Like many effects pedals, it was invented in the 60s as an attempt to replicate rotating Leslie speaker cabs. The univibe was one of the key elements of Hendrix’s sound.
 

Gain Based Effects Pedals

Mainly, there are three options: distortion, overdrive, and fuzz. Let’s look at each one.
 

DISTORTION

One of the most commonly used effects for hard rock and metal, distortion emits an aggressive heavy sound, while sustaining the tone and adding a very noticeable ‘crunch.’ It’s one of the few pedals that has defined a genre of music (heavy metal) and is an essential guitar pedal for that style of music.
 

OVERDRIVE

Similar to the distortion effect—although much more subtle and less aggressive— overdrive ‘beefs-up’ your sound and adds a heaviness which is perfect for classic rock and roll, blues and other genres that rely on the deep, heavy tones. If you’re into Stevie Ray Vaughan.
 

FUZZ

One of the original transistor effects and surfacing in the early 1960s, fuzz provides a sound much like its name suggests.


These boxes create a rounded, warm and sparkly distortion sound, providing a meatier and more sustained tone. Dynamic fuzz boxes are ideal for preserving the critical elements of touch and tone—an enriched sound that allows the tone to be heard loud and clear.

Time-Based Effects Pedals

CHORUS

Chorus is a time-based modulation effect that gives you a thicker, richer, almost ‘dreamy’ quality – like you have two or more instruments rolled into one. It mirrors the minute changes in pitch and timing that tend to occur when multiple performers sing or play the same part.

It’s used in countless songs, too many to mention here. Its also works superbly well in conjunction with distortion effects. Check out 90s grunge connoisseurs My Bloody Valentine and Sonic Youth to hear how they used the effect, along with a short scale guitar.

 

DELAY

Delay naturally occurs when a sound is produced in an ample space – for example, when a sound wave hits a reflective surface, such as a solid wall, it’s reflected towards us.
The magic of the digital delay (as opposed to the old analog delay pedal) came about in the early 1980s and was rapidly added to the pedalboard of many of the world’s greatest rock gods (e.g., Dave Gilmour).

With its enormous power to create long delays, clean sounds and the fun of 1-16 seconds delays, this tool became one of the most widely used effects in the industry.
 

REVERB

When you play an acoustic, you get natural reverb (echo) from the room you play in. With electric guitars, there is no natural reverb, so you have to rely on an amp (or the best reverb pedal you can get your hand on to add it). Reverb is mostly used to add a bit of depth – a guitar with none applied can be surprisingly unpleasant. Dialing up the effect is used to create a sense of time, space and mood. Just listen to any of David Gilmour’s work and you’ll hear it’s power.
 

LOOPER

Looper pedals are straightforward in concept: you record what you’re playing, which is played back on a loop – providing a perfect backing track to record another line over. Some of the better products let you record several lines of music, and some allow you to import tracks.

Other Pedals

NOISE GATE

noise gate is useful for live music and recordings. This effect is used to electronically lower the volume of the guitar when it is not being played, so the noise produced by other effects will not be audible (in effect, it’s a sort of noise cancelling device).

The main benefit of the noise gate pedal is that it automatically detects the signal level so it can slowly lower the volume while the playing of the guitar fades away. This prevents notes that are fading away naturally—usually towards the end of the song—from being cut off abruptly.
 

EQ (EQUALIZER)

EQ produces offers you more tone control than would generally be possible with basic amplifier bass, middle and treble controls. There are mainly two different types of EQ: graphic and parametric. Graphic equalizers utilize slide controls to adjust the level at fixed frequencies, called bands.

These provide a graphic or visual representation of the overall frequency response. Parametric equalizers, on the other hand, provide bass and treble controls that work as normal tone controls to allow broad shaping.
 

TUNER

The tuner detects and displays the pitch of a guitar’s musical notes. The “pitch” is the high point and low point of a musical note, typically measured in Hertz. Unless you have pitch perfect hearing, tuners are significantly more accurate than attempting to tune by ear alone.

Another benefit is they let you tune-up on stage when it’s too noisy to hear, thanks to illuminated LED displays.
 

TREMOLO (VIBRATO)

The Tremolo (or vibrato) effect was one of the first to hit our soundwaves and is synonymous with Dick Dales surf sound. It has a circuit that fundamentally changes the volume of the signal at a specific frequency.
 

BOOST

Boost pedals add gain to your signal before it hits the input stage on your amp – improving your high gain tone. One of the most basic and widely used stompboxes, it augments the sound without adding distortion or making any equalizer adjustments. Boost will also preserve the timbre of the guitar in its original form.
 

VOLUME

Volume pedals are used to adjust the volume up or down and are typically placed at the end of a “signal chain. When you position it at the end of the chain, you’re alternating the processed signal as a whole. The main reason to use one, therefore, is to alternate the whole chain and create swells, etc.
 

PLEXI

If you want the crunch of a classic Marshall amp, without having to shell out for an actual amp, a plexi pedal may be the ticket. Named after the plexiglass fronts on Marshall 100 watt heads, they give you that vintage tone at a fraction of the price.
 

PEDALBOARDS

So what else might you need for your pedal set up?

Well, for sure you’ll need a pedalboard (and a power supply) as you start acquiring more and more pedals.

Best Guitar Pedals to Buy First

You may be wondering which are the best pedals to buy to get started? Collecting and experimenting with pedals is a journey, and the ones you choose should be informed by the type of music you’re into.

As a rule of thumb, if you love funk and many types of rock, you’ll need a wah pedal. Overdrive is a worthy addition too to give your tone extra crunch. If you play metal or hard rock, an overdrive pedal is a must also.

If you’re more into more trippy stuff (Dave Gilmour etc.) get a decent delay or reverb pedal. If you’re chasing that classic 80’s sound, you’ll need a strong chorus effect.


Best Acoustic Guitar Pedals

Even if you’re a long time acoustic musician, one or two effects can help you to expand what music you and your instrument are capable of creating. For a start, a looper is just as useful for acoustic players as it is for electric, and chorus, delay, and reverb also help to fill out an acoustic guitars sound. Any of the pedals above can and have been used to create fantastic sound – just experiment. How about pedals that are specific to acoustic guitar?
 

ACOUSTIC PREAMP

If you’ve ever tried amplifying an acoustic guitar via a pickup, you’ll know how prone to feedback they are. An acoustic preamp pedal gives you back control of your EQ – and stops you relying on lackluster EQ settings that come with factory installed pickups – as well as cutting out unwanted feedback and distortion.
 

ACOUSTIC SIMULATOR

Not a pedal to be used with acoustic guitars as such, but acoustic simulator pedalsreproduce the sound of acoustic guitars. While it will never match the sound of a real acoustic, some come pretty close. Using one is an alternative to carrying two separate guitars, which is handy if you’re traveling and lugging gear about isn’t an option.


Pedal Settings

Let’s now look at common settings you’ll find on many pedals.
 

TRUE BYPASS

true bypass circuit lets you remove 100% of the pedal’s effect from the guitar signal when it’s switched off. The problem is that many pedals, notoriously Boss ones, have a circuit which is always connected – even when it isn’t in the on position.
 
Because non-true bypass pedals are technically always ‘plugged in,’ even when you switch them off, they still affect your tone in some way. This can’t be prevented unless you modify them – which isn’t always an option. If a pedal in the off position changes your tone, it is referred to as ‘Tone Sucking.’ Wah-Wah and Fuzz pedals are usually the biggest culprits of causing tone sucking to occur.
 
If a pedal has true bypass, no circuit portion will interact with circuit portions of other 
pedals, the guitar’s pickups or your amp. Therefore, true bypass pedals mean that you ultimately have more control over what your final setup will be and lets you maintain a clean signal running from your guitar through to the amp. They also prevent you from having to use extra noise gates to adjust signal levels.
guitar pedal infographic