The thing nobody tells you about tuning
A guitar is never quite in tune. That isn't pessimism — it's physics. The instrument is a wooden box under a couple hundred pounds of string tension, and every time you tighten one string you bend the neck a hair and pull the others slightly flat. So tuning isn't a single act you complete; it's a small negotiation you return to. Once you understand that, the whole process gets calmer, and you stop chasing your own tail.
Standard tuning, from the thickest string to the thinnest, is E2, A2, D3, G3, B3, E4. The two outer strings are both E, two octaves apart, which is a useful sanity check: when you finish, the lowest and highest strings should ring as the same note in different registers. If they don't, something upstream went wrong.
Start with the tuner, not your ego
There's a romantic idea that "real" musicians tune by ear and tuners are for beginners. The truth is the opposite. A good chromatic tuner gives you an objective reference, and the fastest way to develop your ear is to check yourself against one constantly until your guesses start landing. So plug in or hold the instrument near the mic, play a single string cleanly, and watch.
A chromatic tuner doesn't assume which string you're playing — it just names the nearest note and tells you how far off you are, measured in cents. A cent is one hundredth of a semitone, so the gap between two adjacent frets is 100 cents wide. When the readout says you're at "E, +12 cents," you're a touch sharp; the actual pitch sits just above E, twelve hundredths of the way toward F. Your job is to bring that number to zero.
Turn the peg slowly. Most tuning mistakes come from turning too fast and overshooting, then correcting, then overshooting the other way. Approach the target from below — let the string go slightly flat, then tighten gently up to pitch. A string tuned up to its note holds better than one tuned down to it, because the slack in the tuning post and nut settles in the direction of the pull.
Listen for the wobble
Once the needle settles, close your eyes and listen. A note that's in tune sounds still. A note that's slightly off sounds like it's breathing — a slow pulsing, a faint wah-wah-wah. That pulse is real and measurable: when two pitches are close but not identical, their sound waves drift in and out of alignment, and the volume swells and fades at exactly the difference between their frequencies. Two strings five cents apart will beat slowly; ten cents apart, faster. Tuners turn this into a needle, but the beating was always there, and learning to hear it is what "tuning by ear" actually means.
This is why the eyes-closed check matters even after the tuner says you're done. Pick two strings that should sound consonant together — the open A and the open D, say — and let them ring. If you hear that slow wobble, one of them is fractionally off, and your ear will often catch it before a needle that's hovering near zero.
The relative method, for when there's no tuner
You won't always have a screen. The classic by-ear method tunes every string against the one next to it. Fret the low E string at the fifth fret — that gives you an A, the same note as the open A string. Play both; tune the open A until the wobble disappears. Move up: fifth fret of A gives you a D for the open D string. Fifth fret of D gives you a G. Then the pattern breaks for one string — the fourth fret of G gives you the B — before returning to the fifth fret of B for the high E. Fifth, fifth, fourth, fifth: that little hiccup trips up everyone at first, and then it becomes muscle memory.
The catch with the relative method is that errors compound. If your starting E is slightly flat, every string you tune from it inherits that flatness, and by the time you reach the high E the drift is audible. That's why even ear-trained players anchor the first string to a reference — a tuning fork, a piano, or a tuner — and tune everything else from there.
Why it slips, and what to do
New strings stretch. A freshly restrung guitar will fall out of tune for a day or two no matter how carefully you set it, because the string is physically lengthening as the windings seat. Help it along by gently pulling each string away from the fretboard and re-tuning a few times; you're doing the stretching deliberately instead of letting the music do it for you.
Temperature and humidity move things too. A guitar carried in from the cold will drift sharp as it warms, the wood and string tension shifting together. None of this is a defect. It's just the reason tuning is a habit rather than a one-time chore — a thirty-second ritual you do before you play, not a problem you solve once.
And there's a subtler issue baked into the fretboard itself. The frets are placed for equal temperament, a compromise that spaces all twelve notes evenly so the guitar plays acceptably in every key. The cost is that no interval is perfectly pure — a tuner reading dead-zero on every open string will still leave certain chords sounding a few cents off, especially the G and the B. Seasoned players sometimes nudge those strings a hair to favor the keys they're about to play in. You don't need to worry about that yet, but it explains why a "perfectly tuned" guitar can still sound slightly restless. It's not you.
Where Maestro fits
Maestro was built for exactly this loop. Its tuner runs real-time pitch detection natively, so the needle is fast and stable instead of laggy and twitchy, and it shows you the cents reading plainly — turn the peg until the note locks and the gauge glows green. There's a guitar preset with the six open strings laid out as chips, a haptic tick that buzzes the instant you hit the note so you can tune without staring at the screen, and a strobe view for the kind of fine resolution that catches drift a needle smooths over. If you want one calm, accurate place to do the small daily negotiation a guitar always asks for, it's at maestro.lumenlabs.works.