Chords on the violin · From Zero to Mozart

A violin can't easily play a whole chord — the bridge is curved, so the bow catches at most two strings cleanly at once. So how does a violinist "play harmony"? Two ways: double stops (two notes = a piece of a chord), and rolled chords (three or four notes swept fast). And just as important: hearing the chord your single line is outlining.

Double stops are chord fragments

Any two notes a 3rd, 6th or octave apart is a slice of a triad:

50 bpm

B and D, a 3rd — the 3rd and 5th of a G major chord. B and G, a 6th — the 3rd and root. Play either as a double stop and the ear supplies 'G major'. Two notes are often enough to state a chord, as long as one of them is the 3rd.

3rds and 6ths are the sweet, singable double stops — most of the harmony you'll play in duets is one of these.
Octaves state the root plainly.
A 5th (like your open strings) is hollow — root and 5th, no 3rd, so no major/minor.

Which two notes to hold from a triad

If a three-note chord is written and you can only sustain two, keep the 3rd and the root (or the 3rd and the 5th) — because the 3rd is the note that carries the chord's identity. Drop the 5th before you drop the 3rd.

Rolled chords

For a written 3- or 4-note chord, sweep the bow fast from the lowest string up, landing on and holding the top note or two. You met the notation in Stage 3; the technique is Stage 6. The key fact: it's broken in time, not sounded all at once.

50 bpm

A G major chord — open G, open D, B on the A string. Sweep bottom to top, quick, and let the top note ring. A violinist's chord is always a fast arpeggio in disguise.

Hearing the chord under your line

Even a plain single-note melody is implying a chord at every moment. When you play a phrase that arpeggiates G–B–D, you're playing a G chord — no double stops needed. Reading your own part for the harmony it outlines is the real skill: it tells you which notes are structural (chord tones, hold them, tune them carefully) and which are passing (lighter, quicker).

Try it

Try

Play a slow C major scale, and after each note name the chord it most likely belongs to (C, E, G → the C chord; D, F, A → could be the G7 or the F chord). You're reading the harmony out of a one-note line. Then play E and G together as a double stop — the same C chord, stated with two notes instead of one.

The usual mistake

Thinking harmony is something only the accompanist does. Your line is harmony too — it outlines chords note by note, and it lands on double stops at cadences. Knowing which chord you're inside at any moment is what lets you tune the important notes to ring and phrase toward the arrivals.