Doubler vs chorus vs micro-pitch: why fake doubles sound fake
Short version, for the people who got here from a search: a doubler is trying to imitate a second performance of your part. Chorus and micro-pitch tricks just smear a copy of the one performance you already have. Your ear can tell the difference, even when you can't name why. That's basically the whole article — but the why is worth knowing before you spend money on anything, including mine.
What a real double actually is
If you've never done it: you record your rhythm part, then you record it again. Same riff, same guitar, same everything. Pan one take hard left, the other hard right. That's it. That's the sound. Pretty much every heavy record you've ever loved is doing this, and the big ones often do it twice per side.
Here's the part that matters: the magic isn't in either take. It's in the differences between them. Your picking hand is not a robot. Take two lands a few milliseconds early here, a few late there, a few cents sharp on that bend, a slightly different attack on the palm mutes. None of it repeats, none of it sits still. Two performances that are 99% the same, where the 1% never stops moving — that's what your brain hears as "two players," and it's weirdly good at detecting it.
The usual tricks, and how each one gives itself away
Copy-paste the track and pan the copies. I have to mention this one because everyone tries it once. It does nothing. Identical copies sum back into one louder mono guitar — there's no difference between the sides, so there's nothing to be wide with. Not a trick, just a volume knob with extra steps.
Delay + detune. The old-school move: duplicate, slide the copy 20–40 ms, knock it a few cents flat. And to be fair, it does sound doubled… for about four seconds. The problem is the relationship between the takes is frozen. Real takes drift toward and away from each other; this one is nailed to the floor. Your brain files it under "effect" almost immediately, and the fixed delay adds a comb-filter edge that gets worse the more gain you use.
Chorus. A chorus is a delay that wobbles. It does move, which puts it one up on the trick above — but it moves in a cycle, because an LFO is doing the moving. Players don't drift in sine waves. So instead of "two guitarists," you get that seasick shimmer that says "pedalboard" from across the room. Which is a perfectly good sound! It's just not doubling, and mislabeling it is how people end up disappointed.
Micro-pitch shifting. The studio classic: one side pitched up a hair (call it 5–10 cents), the other down, tiny delay offsets on each. Honestly, the best of the old tricks — on a quick listen it gets most of the way there. But the offset is constant. Real doubles are sharp here, flat there, dead-on in between. Once you hear the sameness of it, you can't unhear it. And a lot of these setups get their width from tricks that fall apart the moment someone sums them to mono, which brings me to…
The mono thing (or: the venue PA will bust you)
Plenty of the systems your mix will actually play on are mono or close to it — phone speakers, bluetooth bricks, a lot of venue PAs. Sum a real double to mono and it just gets a bit narrower; the performance is still two performances. Sum a static delay/pitch trick to mono and the two near-identical signals interfere with each other — comb filtering — and you get that hollow, phasey wash where your huge rhythm sound used to be. If you've ever heard a "wide" guitar turn into a kazoo through a mono PA, this is what happened.
So what actually works?
Two honest answers. One: track it twice. Seriously. If you have the time and your playing is tight enough, a real second take beats every product in this category, including the one I make. It's free, and chasing tight doubles will genuinely make you a better player.
Two: when you can't track it twice — writing sessions, parts that are already committed, one-take keeper moments — you want something that behaves like a second player instead of a frozen copy. The test is simple: does the difference between the sides keep changing, the way two humans would? And does it hold together in mono?
Full disclosure, this is the part where I tell you I make one of these. Doppel is a doubler built on decorrelation that's constantly moving — modulated by the performance itself, with a Re-roll button when you want a different "take" — and it's designed to stay solid in mono (there's a goniometer and phase meter right on the panel so you can watch it behave). I built it because every trick above annoyed me on real mixes. There's a free demo, so you don't have to take my word for any of this. In fact, don't:
Level-matched A/B — same take, four versions
One DI take, doubled by Doppel — decorrelation that keeps moving, like a second player.
The fairest comparison in there is "Doppel" against "Real double take" — the reference is a genuinely performed second take. The "traditional doubler" is the delay/detune trick from earlier, so you can hear the phasey edge for yourself instead of trusting an article on a plugin company's website.
When chorus is the right call anyway
Quick defense of chorus, because this article probably reads like a hit piece: if you want the guitar to sound affected — 80s cleans, shoegaze smear, the watery "Come As You Are" thing — chorus is the correct tool and a doubler is the wrong one. The point was never "chorus bad." It's that chorus, micro-pitch, and doubling are three different sounds, and knowing which one you're actually after saves you money and mix headaches.
FAQ
Is a doubler the same as a chorus?
No. A chorus is a modulated delay — it takes one performance and wobbles a copy of it, which reads as an effect. A doubler is trying to imitate a second, separate performance of the same part. They solve different problems: chorus is a sound, doubling is an arrangement move.
Can I double a guitar by copying the track and panning the copies?
No. Two identical copies sum back into one louder mono guitar — panning them apart does nothing, because there is no difference between the sides for your ear to hear. A double only works because the two performances are slightly different.
How many cents of detune do people use for fake doubling?
The classic micro-pitch recipe is somewhere around 5–10 cents up on one side, the same amount down on the other, plus a small delay offset. It gets you width, but the offset is frozen — real players drift constantly — so it still reads as processing on close listening.
Do doubled guitars work in mono?
Real doubles do — they just get a little narrower and stay solid. Static delay and pitch tricks often do not: summing the sides causes comb filtering, which is that hollow, phasey wash you hear when a widened track hits a mono speaker or venue PA.
If I own a doubler plugin, should I still double-track for real?
When you have the time and the takes are tight, yes — a genuinely performed double is still the reference sound, and it costs nothing. A good doubler is for when you cannot track it twice: writing sessions, one-take-wonder moments, live rigs, or thickening a part that is already committed.
Want the doubler that started this rant? Doppel — $49, free demo, Windows VST3. Or go track your parts twice; either way your mixes win.