Good news first: you already know where every note on a bass is. The four strings of a standard bass are E–A–D–G — the bottom four strings of your guitar, letter for letter, tuned in the same perfect fourths, sounding one octave lower. No re-entrant surprises, no new interval pattern, no mirror-world. Your fretboard knowledge transfers whole. What does not transfer is the job — and understanding that difference early is worth more than any amount of technique.
The bottom-four map
Every row below is computed from this site’s instrument registry — the same data that draws the chord and scale pages — and CI re-derives it on every change, so the table cannot drift from the instruments it describes:
| String | On guitar | On bass | Gap |
|---|---|---|---|
| E | E2 | E1 | one octave |
| A | A2 | A1 | one octave |
| D | D3 | D2 | one octave |
| G | G3 | G2 | one octave |
Because the interval pattern is straight fourths with no major-third kink — the B-string wrinkle that bends every guitar shape lives ABOVE the strings a bass keeps — your moveable patterns work unedited. The minor pentatonic box, the major scale, three-notes-per-string fragments: finger them identically and they simply sound an octave down. Browse the bass scale maps and you will recognize every shape on sight; the only new reading skill is trusting that recognition.
The job is what changes
On guitar you spent years asking “what can I add?” On bass the professional question inverts: “what does this moment need?” Three re-calibrations do most of the work:
- You own the root. When the chart says G7, the band trusts the bottom of that chord to you personally. The chord pages here lead with arpeggios and chord tones rather than strummable grips for exactly this reason — a bassist plays chords one note at a time, as lines.
- You own the floor of the time. Guitarists ride on top of a groove; bassists are load-bearing. Note placement and note length stop being feel-adjacent details and become the actual instrument — the groove guide is the syllabus for this, and it is the single best place to spend your first month.
- Density inverts. The busiest guitarist wins the guitar-store jam; the bassist who can play four perfect quarter notes wins the gig. Fight the fill instinct until silence feels like a choice rather than a failure.
Hands: what to keep, what to rebuild
Left hand: keep everything, then widen it. Bass frets are guitar frets scaled up — the one-finger-per-fret grip needs a genuine stretch low on the neck, and many bassists borrow the double-bass habit of covering three frets instead of four down there. Fretting force goes up; sloppiness that a distorted guitar amp forgave, a bass amp reports faithfully.
Right hand: this is the rebuild. If you come with a pick, you may keep it — pick bass is a proud tradition, not a shortcut — but learn alternating two-finger plucking anyway, because half the music you will be hired for assumes its sound. Anchor the thumb on a pickup, alternate index and middle strictly, and mute with every part of both hands that is not currently making a note. String crossing at speed is the skill that feels new; the daily drills hit it directly.
The unlearn list
- Barre-chord thinking. Full grips down here turn to mud; when you do double-stop, root-and-fifth or root-and-tenth is usually the ceiling.
- Guitar-amp instincts. Scooped mids disappear in a band; a bass lives in the frequencies guitarists were taught to cut.
- Soloist reflexes. Save them — then spend them rarely, and mostly on walking lines, where note-choice craft pays out every single bar.
Tone translation
Your guitar-tone instincts need a polarity flip. The frequencies you spent years taming — low mids, fundamentals — are now the product, and the sparkle you chased is now optional garnish. Start every knob at noon, cut nothing below 250Hz without a reason, and judge tone in the band, never solo: a bass sound that thrills alone often vanishes onstage, and the slightly dull one usually wins. A tuner you trust matters more than any pedal — ours is free — and the metronome outranks both. Effects survive the trip (drive and compression especially), but they season the foundation; they cannot substitute for it.
One octave down, several doors in
The family offers you a halfway house: the Bass VI keeps all six of your strings — EADGBE, everything an octave down — and is the gentlest possible landing for a guitarist, at the price of narrow string spacing and a chordier temperament. The 5-string extends your familiar map below the E instead; the double bass shares the tuning but none of the geometry (no frets, positions by ear). Start on four strings anyway — see the first-bass guide — and let the extensions recruit you later.
Where to go next
- Groove — the job description, with drills; guitarists who read it first skip a year of bad habits.
- Bass scale maps — your shapes, one octave down, roots marked as targets.
- Progressions — the keys you already know, re-read as root movement.