Image 1: Impulse response reverbs like Audio Ease’s Altiverb excel at cloning real acoustic spaces.
The entire world of ’verb—from traditional to extreme—really does lie at your fingertips. Here’s how to access it.
This article is for recording guitarists eager to make the most of reverb plug-ins. We’ll explore the various reverb types, decode the controls you’re likely to encounter, and conclude with some suggestions for cool and creative reverb effects.
This is not a buyer’s guide, though you’ll hear many different products. Our focus is common reverb plug-in parameters and how to use them. Nearly all modern DAWs come with good-sounding reverbs. You can also add superb third-party plug-ins. But there are also plenty of free and budget-priced reverbs—just google “free reverb plug-in.”
Reverb = delay. Reverb is merely a delay effect. Sounds traveling through air eventually encounter surfaces. Some sound bounces off these surfaces, producing a complex network of echoes, made even more complex when the initial reflections bounce off secondary surfaces.
The controls on reverb plug-ins define how the software mimics this process. Function names can be confusing, but remember, everything relates to acoustic phenomena that you already understand intuitively. For example:
- The space’s size. (The further a sound travels before hitting a surface, the slower the echoes arrive.)
- The hardness of the reflective surfaces. (The harder the material, the louder, brighter, and more plentiful the echoes.
- The relative angles of the reflective surfaces. (A square room sounds different than a round one, which sounds different than a trapezoidal one.)
- The presence of other objects. (Soft surfaces like carpets, cushions, and acoustic foam diminish the reverb, usually affecting some frequencies more than others.)
- The listener’s location. (The further an ear or microphone from the sound source, the more reverberation is perceived.)
Understanding Reverb Types
By definition, all reverb plug-ins are digital. Most are either algorithmic or convolution-based. Algorithmic reverbs employ delay, feedback, and filters to mimic sounds bouncing around in space. Convolution reverb (also called impulse response or IR reverb) creates “snapshots” of actual sonic spaces and audio devices. In convolution, developers amplify a test tone in the targeted space (or through a target piece of audio gear) and record the results. The software compares the new recording to the dry test tone, and then it applies corresponding adjustments to any audio, making it sound as if it was recorded in the modeled space or through the modeled gear. (That’s how the speaker simulations work in most amp modelers.) Algorithmic and convolution reverbs often perform the same tasks, just via different methods.
But when we make musical choices, we rarely think, “This should be algorithmic and that should be convolution.” We’re usually trying to evoke a particular sound: a place, an old analog device, a freaky sound not found in nature. So, let’s take a whirlwind tour of reverb history, with thoughts about obtaining those sounds via plug-ins.
A Haul-Ass Reverb History
Real spaces. Before the 20th century the only reverbs were actual acoustic environments: caves, castles, temples, tombs. It wasn’t till the 18th century that people began constructing spaces specifically for their sonic properties—the roots of the modern concert hall.
Convolution reverbs excel at conjuring specific places. Most IR reverbs include libraries of such sounds. Some evoke iconic spaces and famed studios. IRs can also mimic small spaces, like a closet or compact car.
Clip 1 — A Guitarist’s Guide to Reverb Plug-ins by premierguitar
In Clip 1, you hear the same acoustic guitar snippet through IRs captured inside the Great Pyramid of Giza, the isolation block at Alcatraz prison, Chartres cathedral, and the interior of a VW Beetle, all using Audio Ease’s Altiverb library. (For demo purposes, reverb is applied rather heavily in all audio examples.)
Echo chambers were the earliest form of artificial reverb, though they aren’t all that artificial. The chamber is usually a room with hard, reflective surfaces. A loudspeaker in the chamber amplifies dry recordings, and a distant microphone records the results. It’s still “real reverb,” only it can be added and controlled independently from the original recording. This process evolved during the 1930s and ’40s. The first popular recording to use the effect was 1947’s “Peg o’ My Heart” by the Harmonicats, produced by audio genius Bill Putnam.
PEG O' MY HEART ~ The Harmonicats (1947)
During a recent recording session at Hollywood’s Sunset Sound, I shot Video 1 in the famed Studio A echo chamber, thanks to house engineer George Janho. You’ve heard this very room countless times. The Doors and Van Halen made most of their records here. You also hear this reverb on “Whole Lotta Love,” the vocal tracks on the Stones’ “Gimme Shelter,” Prince’s 1999 and Purple Rain, and countless other famous recordings.
Sunset Sound Chamber
Echo chambers are well represented in most IR reverb libraries. Most algorithmic reverbs do chambers as well, replicating the general effect without modeling a particular space. You can even find plug-ins dedicated to a specific chamber, like Universal Audio’s Capitol Chambers, which models the Hollywood chamber famously used by Frank Sinatra.
Spring reverbs. These were the first truly artificial reverbs. They initially appeared in pre-WWII Hammond organs, and by 1960 or so they had migrated to guitar amps. Fender wasn’t the first company to make reverb-equipped amps, but their early-’60s reverb units still define the effect for many guitarists.
The reverb effect is produced by routing the dry signal through actual springs, with a microphone capturing the clangorous results and blending them with the original tone. Springs generally sound splashy, trashy, and lo-fi, often in glorious ways. It’s an anarchic sound, best captured in a plug-in via IRs. Most of the spring reverb sounds in guitar modelers are IR-based. Meanwhile, reverb stompboxes—usually algorithmic—mimic the sound with varying degrees of success.
Plate reverb appeared in the late 1950s, initially in the Elektromesstechnik EMT-140, which remains a sonic gold standard. Plate reverb works similarly to spring reverb, but a massive metal sheet replaces the springs. It’s generally a smooth, sensuous sound relative to a spring.
Clip 2 — A Guitarist’s Guide to Reverb Plug-ins by premierguitar
In Clip 2, you hear the same acoustic guitar snippet through impulse responses of a Fender spring reverb unit and a vintage EMT-140 plate.
There are countless plate clones among today’s reverb plug-ins. Some are convolutions based on analog gear. But algorithmic reverbs also excel at faux-plate sounds. In fact, one of the initial goals of early digital reverb was to replace cumbersome mechanical plates. Speaking of which.…
Digital reverb (the algorithmic kind) arrived in 1976 via the EMT-250, also from Elektromesstechnik. Lexicon and AMS produced popular rivals. They focused largely on mimicking rooms, chambers, and plates. Sound quality has improved over the decades thanks to increased processing power and clever programming.
Today you can get far “better” algorithmic reverb from plug-ins. But ironically, those primitive digital ’verbs are trendy again in pop production. You can find precise clones of retro-digital hardware in plug-in form.
Convolution reverb debuted at the end of the century, popularized by Sony’s DRE S777 unit. Convolution reverbs often have fewer controls than their algorithmic cousins because most of the process is baked into the impulse response.
Most convolution reverbs have similar sound quality. The free ones can sound as good as the pricy ones. Higher prices are often based on the size and quality of the included IR libraries. Google free reverb impulse responses for gratis goodies.
Recent wrinkles. There are always interesting new reverb developments. For example, Things — Texture from AudioThings and Silo from Unfiltered Audio are anarchic granular reverbs that loop and manipulate tiny slices of the reverb signal to create otherworldly effects ranging from the brutal to the beautiful.
Clip 3 — A Guitarist’s Guide to Reverb Plug-ins by premierguitar
Clip 3 includes several granular reverb examples.
Image 2: Zynaptiq’s innovative Adaptiverb generates reverb via pitch-tracking oscillators rather than delays and feedback loops.
Some newer reverbs employ artificial intelligence to modify the effect in real time based on the audio input. iZotope’s Neoverb automatically filters out frequencies that can muddy your mix or add unwanted artifacts. And Zynaptiq’s Adaptiverb generates reverb in a novel way: Instead of echoing the dry signal, it employs pitch-tracking oscillators that generate reverb tails based on the dry signal. It, too, excels at radical reverbs suitable for sound design.
Clip 4 — A Guitarist’s Guide to Reverb Plug-ins by premierguitar
Clip 4 demonstrates a few of its possibilities.
Common Reverb Plug-in Controls
The knob names on a reverb plug-in can get confusing, but remember that they control variables that you already understand intuitively. Also, not all controls are equally important. The most essential ones are the wet/dry balance and the reverb decay time (how long it continues to sound). By all means learn the subtler functions, but don’t be surprised if you use them only rarely.
Video 2 walks you through most of the controls you’re likely to encounter on an algorithmic reverb plug-in. I used ChromaVerb from Apple’s Logic Pro DAW for the demo, but you’ll encounter similar parameters on most algorithmic reverb plug-ins.
Digital Reverb Walkthrough
Creative Reverb Ideas
Spring things. The single reverb knob on vintage amps is simply a wet/dry blend control. Some spring reverbs add a dwell control to set the amount of reverb input. Higher settings mean louder, longer reverberation.
But in the digital realm, you can deploy old-fashioned spring reverb in newfangled ways. For example:
- Pan the dry signal and spring sound apart for a broad stereo effect. (Traditional spring reverb is strictly mono.)
- Add predelay, inserting space between the dry and wet signals. (If the plug-in has no predelay control, just add the effect to an effect bus with a 100 percent wet, no-feedback delay upstream.)
- Route a guitar signal to two different spring reverb sounds, panned apart.
- Assign the reverb to an effect send, add a compressor to the effect channel, and then sidechain the compressor to the dry guitar sound. That way, the reverb is ducked when the guitar is loud, but swells to full volume during quiet passages.
- Apply digital modulation to the wet signal for detuned or pulsating effects.
Clip 5 — A Guitarist’s Guide to Reverb Plug-ins by premierguitar
Clip 5 starts with a straightforward spring sound before demonstrating the above options in order.
Fender-style reverb is so ubiquitous that simply using less familiar spring sounds can be startling.
Clip 6 — A Guitarist’s Guide to Reverb Plug-ins by premierguitar
Clip 6 is a smorgasbord of relatively obscure spring sounds from AudioThing’s Springs and Amp Designer, Logic Pro’s amp modeler.
Finally, it can be exciting to use springs on tracks that don’t usually get processed that way. For example, spring reverb is often considered too quirky and lo-fi to use on acoustic guitar or vocals.
Clip 7 — A Guitarist’s Guide to Reverb Plug-ins by premierguitar
But Clip 7 shows how attractive springs can sound on voice and acoustic. (You hear the dry sounds first.)
Unclean plates. In contrast to a spring’s lo-fi clank, simulated plate reverb is smooth and warm. Even if your track already has spring reverb, you might apply some plate ’verb to integrate it into a mix.
One creative avenue is deploying smooth plate reverb in relatively lo-fi ways. For example:
- Try placing the reverb before an amp modeler on a track to mimic a reverb stompbox. That way, the reverb is colored by both amp and speaker.
- Imagine a guitar amp with a huge metal plate inside instead of springs. If your amp modeler lets you use pure amp sounds without speaker modeling and vice-versa, try sandwiching a plate sound between two instances of amp modeler on the same track. Turn off the speaker sound on the first amp sim and use only the speaker sound on the second one. This way, only the speaker colors the reverb.
- Plate reverb also sounds great panned separately from the dry sound.
Clip 8 — A Guitarist’s Guide to Reverb Plug-ins by premierguitar
Clip 8 starts with a conventional plate sound before demoing the above ideas.
Liquid reverb. Reverb plug-ins have one big advantage over hardware: Everything can be automated within your DAW.
Automated Reverb
In Video 3 I’ve written automation for both the decay time and reverb damping for an evolving effect that would have been difficult on hardware.
Oh, the places you’ll go. Convolution reverbs usually have fewer controls than their algorithmic cousins. You might do no more than adjust the wet/dry or fine-tune the decay time. But IR reverbs don’t have to be “plug and play”—especially if you create your own reverbs. It’s a surprisingly simple process. (Some IR reverbs, like Altiverb and Logic Pro’s Space Designer, come with an app to generate the needed signals and process the recordings for use.)
Image 3: You can get cool, if unpredictable, results by dropping random audio files into an impulse response reverb like Logic Pro’s Space Designer.
Theoretically, you need a hi-fi PA system to amplify the needed tones in the target space, and good microphones to capture the results. But not always! I’ve captured cool IRs in my travels with nothing more than an iPhone and a spring-loaded clipboard in lieu of the traditional starter pistol. I’ve even obtained decent results by clacking a couple of stones together.
Clip 9 — A Guitarist’s Guide to Reverb Plug-ins by premierguitar
Clip 9 includes quick and dirty IRs that I captured in a Neolithic cave painting site in France, a thousand-year-old ancient Anasazi ball court in Arizona, an ancient Greek stone quarry, a 19th-century limestone kiln in Death Valley, and the inside of an acoustic guitar.
You can also get interesting, if unpredictable, results loading random audio files into the IR reverb.
Clip 10 — A Guitarist’s Guide to Reverb Plug-ins by premierguitar
Clip 10 features a dry guitar snippet, followed by bizarre reverb effects generated by drum loops, synth tones, and noises.
New sounds, new spaces. Using reverb plug-ins can be incredibly simple. Often it’s just a matter of scrolling through factory presets, or making basic balance and decay time adjustments. You can also use them in endlessly creative ways. Whatever your goals, I hope this article helps you find exactly the sounds you seek.
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Discover the Best Rig Rundowns of 2023: Top 10 Must-See Gear Showcases
This year PG landed some elsuive white whales (TOOL, Pantera & Jack White), revisited some revamped setups (Jason Isbell, Foo Fighters & Kingfish), and got introduced to some unusual gear (King Gizzard and the Lizard Wizard. Plus, the hosts share their favorite moments from the last 52 episodes before dropping a few coins into the wishing well for 2025 Rundown guests.
12. Green Day Rig Rundown
The legendary punk band are in the middle of an enormous multi-anniversary tour, celebrating both Dookie and American Idiot. Check out how bassist Mike Dirnt and guitarist Jason White tuned their road rigs to cover decades of sounds.
11. Knocked Loose Rig Rundown
Ungodly, sinister, and maliciously menacing guitar tones erupt from the Kentucky hardcore band’s 7-string Ibanez models, providing the soundtrack to the summer’s biggest mosh pits and nastiest breakdowns.
10. Jason Isbell & Sadler Vaden Rig Rundown
With four Grammys, loads of gear, and millions of tour bus miles, Isbell is back for an updated Rig Rundown with his 400 Unit co-guitarist, Sadler Vaden.
9. Extreme's Nuno Bettencourt & Pat Badger Rig Rundown
Guitar legend Nuno Bettencourt crashes his own Rundown to showcase the “Bumblebee” guitar he cooked up to honor Eddie Van Halen, while bassist Pat Badger shares two killer stories about basses that once belonged to members of Van Halen and Aerosmith.
8. Slash's Blues Ball Band Rig Rundown
The rock ’n’ roll icon brings his blues-rockin’ Orgy of The Damned to the people headlining the S.E.R.P.E.N.T. Blues Festival tour.
7. Kingfish Rig Rundown
Kingfish doesn’t play a lot of gear, but with a signature Fender Tele Deluxe, a Chertoff Custom guitar, a pair of road-worthy amps, and a handful of effects, the Clarksdale, Mississippi, native is well on his way to becoming the blues’ newest 6-string ruler. He returns for his second Rundown with a Grammy under his belt, supporting his new Live in London album.
6. Jack White Rig Rundown
Get an up-close look at the tone wizard’s rig for his action-packed 2024 tour.
5. Jerry Cantrell Rig Rundown
The legendary Alice in Chains axeman gives us a look at his updated solo touring setup.
4. King Gizzard and the Lizard Wizard Rig Rundown
Just like their records, the Australian rockers’ road gear is eclectic and adventurous, ready to cover ground from metal to microtonal Turkish psychedelia.
3. Foo Fighters’ Chris Shiflett Rig Rundown
The Foos’ guitarist and intrepid Shred With Shifty host opens the guitar garage for his current tour and details his brand-new pedal setup.
2. Pantera's Rex Brown & Zakk Wylde Rig Rundown
The original Cowboys from Hell bassist reclaims his spine-rattling position as the band's charging piston, while his guitar brother brings his fleet of Wylde Audio gear and a few tone sweeteners from Dimebag Darrell's private stash.
1. Tool's Justin Chancellor Rig Rundown
The bass lord morphs and mutates between rhythm and lead parts with a hearty Wal 4-string, Gallien-Krueger crushers, and a pedalboard that could make Adam Jones jealous.
OM-balance and comfort suited for the fingerstylist on a budget.
Comfortably, agreeably playable. Balanced dimensions. Nice fretwork.
Lighter mahogany top looks less classically mahogany-like. Some compressed sounds in heavy-strumming settings.
$299
Guild OM-320
guildguitars.com
The Premier Guitar crew is spoiled when it comes to hanging out with nice flattops. But while those too-brief encounters with acoustics we can’t afford teach us a lot about the flattop at its most refined, they also underscore a disconnect between the cost and the acoustic guitar’s status as a true folk instrument of the people.
Guild’s OM-320, from the company’s new 300 series, sells for $299, which isn’t much more than a good-quality, entry-level flattop cost in the 1980s. Strikingly, there’s a lot of competition in this price class. Even so, the OM-320’s nice build quality and pretty tone in fingerpicking applications stand out in a very crowded price segment.
The United Guild of Deal-Seeking Pickers
Though Guild, in all its incarnations, has always made accessible guitars a part of their offerings, a $300 instrument with the company’s logo might give pause to players familiar with guitars from their various U.S. factories. Quality can be hit-or-miss on any guitar from any brand at the entry level. What’s more, a lot of guitars with different brand names come from just a few OEM facilities—lending a certain sameness on top of irregular quality. But the recent acquisition of Guild by Yamaha, who has a reputation for solid entry-level instruments, inspires confidence as far as these concerns go.
So, too, does the integrity of the OM-320 at the nuts-and-bolts level. I couldn’t find any overt lapses in quality control. And in many spots where that really counts, like the fretwork, the execution is especially good. Little details like the Guild logo overlay (rather than a simple decal) add a soupçon of luxury. So do the Guild-branded, Grover Sta-Tite-style butterbean tuners, which look stylish and feel sensitive and accurate.
“The neck inhabits a comfortable zone between C and D shapes that’s super agreeable and, at least in my case, a nice antidote for hand fatigue.”
Though the body is built from layered mahogany on the back and sides and a solid mahogany top, the latter is much lighter and amber- or honey-toned than the rich cocoa-hued mahogany tops you’d associate with a vintage Guild M-20, or, for that matter, theM-120 from the company’s contemporary Westerly line. As a result, you see a little more contrast in the grain and a little dimpling in certain sections of the wood. The lighter wood isn’t unattractive, it just looks less trad, if you’re chasing Nick Drake’s Bryter Layter style. If that’s important, you should adjust the “design/build” score appropriately.
Sit and Stay Awhile
Barring being covered in porcupine spines, almost any OM or 000 will qualify as a pure-comfort title finalist. It’s not too thick, too wide, nor too petite—a size and profile that also pays unique, civilized sonic dividends. Here, the OM body is complimented by a neck that feels like an especially natural match. I don’t have a bunch of inexpensive OMs on hand to compare, and there isn’t anything wildly unique about the shape, but the neck profile feels very proportionate to the body. It also, depending on your own sense of such things, inhabits a comfortable zone between C and D shapes that’s super agreeable and, at least in my case, a nice antidote for hand fatigue. The neck is not classically OM-like in terms of nut width. The M-320’s nut measures 1 13/16", which is typical of a 000, rather than the 1 3/4" associated with OMs. The extra width, of course, would make the guitar more appealing to some fingerstylists that need the space. At no point, however, did I feel anything close to cramped; it’s just very comfortable.
The combination of layered back and sides, OM/000 dimensions, and mahogany mean the OM-320 feels and sounds less than super-widescreen in terms of tone spectrum and power. Nevertheless, it sounds balanced and pretty—particularly with a droning, dropped 6th string and other more-elastic tunings where the guitar can exercise the lower extremes of its voice. Tuning to standard has the effect of highlighting midrange emphasis, which can get boxy and render the 3rd and 4th strings a bit less potent and present. That said, it’s still balanced and almost never collapses into a distorted harmonic blur. The bottom end maintains an appealing growl and, as long as you use a gentler picking approach, you can use the highest four strings in very dynamic ways. Using a capo emphasizes other cool, high-mid-focused voices in the guitar that coexist well with most strumming approaches.
The Verdict
Inexpensive guitars that feel great can make up for a lot of shortcomings in tone. But the OM-320’s deficiencies in the latter regard are few, and some perceived limitations, like midrange emphasis, are intrinsic to guitars with OM dimensions. So, while forceful strumming is not the OM-320’s strength, the comfortable playability might just lead you to those places anyway. And if you compensate accordingly with touch dynamics, you can conjure many sweetly chiming tones that might sound extra sweet given the bargain price
Featuring vintage tremolos, modern slicer effects, and stereo auto-panners, the update includes clever Rate and Tempo controls for seamless syncing and morphing.
Today Kemper announces the immediate availability PROFILER OS 12.0 including the highly anticipated collection of advanced Tremolo and Slicer FX for the entire range of KEMPER PROFILER guitar amps.
The Collection features three vintage tremolos, two modern slicer effects, and two stereo auto-panners, that have been derived from the slicer effects. They all feature a clever Rate and Tempo control system, that allows for syncing the tremolo to the song tempo, retriggering the timing by simply hitting the TAP switch, and changing or morphing the tremolo rate to different note values,
The new Advanced Tremolo Modules in Detail
- The Tube Bias Tremolo is the familiar Tremolo in the Kemper Profilers. Formally named "Tremolo“ and available in the PROFILERs since day one, it is a reproduction of the famous Fender Amp tremolos from the 50‘s. Placed in front of the amp it beautifully interacts with the amp distortion.
- The Photocell Tremolo dates back to the 60‘s and features a steeper pulse slope, and its width varies with the intensity.
- The Harmonic Tremolo also dates back to the 60‘s and was introduced by Fender. The low and high frequencies alternate with the tremolo rate.
- The Pulse Slicer is a modern slizer or stutter effect that will continuously transition from the smoothest sine wave to the sharpest square wave, using the "Edge“ parameter. The "Skew“ parameter changes the timing of the high level versus the low level, sometimes also called pulse width or duty cycle.
- The Saw Slicer creates a ramp like a saw wave. The saw wave has a falling ramp when "Edge“ is at full position, and a rising edge at zero position. Towards the middle position a rising and falling ramp are forming a triangle wave. The „Skew“ parameter changes the slope of the rising and falling ramp from a linear trajectory to a more convex or concave shape.
- The Pulse Autopanner and the Saw Autopanner are derivates from their respective Slicers, they spread their signals in the stereo panorama. The "Stereo“-control parameter is included in many effects of the PROFILER. Here, it introduces a novel "super-stereo" effect that lets the Autopanner send the signal well outside the regular stereo image. This effect works best if you are well positioned in the correct stereo triangle of your speakers. When you move the “Stereo” soft knob beyond the +/-100% setting, the super-stereo effect comes into place, reaching its maximum impact at +/-200%.
- A single press on the TAP button at the beginning of the bar will bring the rhythmic modulation effects, such as Tremolo or Slicer, back into sync with the music without changing the tempo. The sync will happen smoothly and almost unnoticeable, which is a unique feature. Of course, tapping the tempo is possible as well.
- Modulation Rate - The “Rate” control available in many modulation effects is based on a special philosophy that allows continuous control over the speed of the modulation and continuous Morphing, even when linked to the current tempo via the To Tempo option. The fine Rate resolution shines when seamlessly morphing from, e.g., 1/8 notes to 1/16 notes or triplets without a glitch and without losing the timing of the music.
PG's demo master quickly (and easily) drops in an H-S-S setup into his 1994 40th Anniversary Stratocaster that needed help. Find out what happens when gets his first taste of active pickups.