Repeat signs: barlines, endings and D.C. / D.S.

The score isn't always read left to right

One of the most surprising discoveries for those beginning to read music is that a score isn't always read in linear order. There are moments when the music says go back, jump, repeat this section. And those instructions are written with a system of signs that, once learned, makes the performer's life much simpler.

Without repeat signs, a piece with an A-B-A structure would have to be written out three times in full. With them, it's enough to write A once, B once, and add the instruction to return to the beginning. The result is more readable, more compact, and easier to memorize.

For the guitarist learning to read scores, mastering these signs is essential. A piece that looks short may be twice or three times as long once the repeats are accounted for. Missing a repeat sign isn't a minor error: it changes the entire structure of the music.

Repeat barlines

The most common sign is the repeat barline. It consists of a double vertical bar — one thin and one thick — with two dots on the inner side. The start repeat barline has the dots to the right and means the section to be repeated starts here. If this opening barline doesn't appear, the repeat is understood to start from the very beginning of the piece.

The end repeat barline has the dots to the left and means the repeated section ends here; go back to the start repeat and play this section once more. Upon reaching it, the performer goes back to the start repeat and plays everything in between again. The second time they reach the end repeat, they continue forward.

In popular guitar — pop, rock, folk — repeat barlines are everywhere. Almost every chorus-verse-chorus structure is notated with repeats. In the classical repertoire, they appear especially in binary forms (A-A-B-B) such as those found in Sor, Giuliani, and Carcassi.

First and second endings

Sometimes a section is repeated almost identically but with a different ending. For this there is the system of repeat endings, also called first ending and second ending. Visually, they are numbered brackets placed above the staff.

Bracket 1 is played the first time through; at the end, return to the start repeat. Bracket 2 is skipped the first time: on the second pass, skip bracket 1 and go directly to bracket 2. This allows writing only the different endings without duplicating the common measures.

In classical guitar, endings are very common in pieces by Sor, where the first and second volta articulate subtle variations in the final cadence of each section.

Da Capo: return to the beginning

Da Capo (Italian for from the head) is the instruction to return to the absolute beginning of the piece. It is abbreviated D.C. and appears at the end of a section or of the piece. The most common form is Da Capo al Fine: return to the beginning and play until the word Fine (end in Italian) appears.

Fine is written above the measure where the music should stop, which is normally not the last written measure but an earlier one. A minuet with trio, for example, is typically written: Minuet — Trio — D.C. al Fine. The performer plays the Minuet, then the Trio, then returns to the beginning and plays the Minuet again, stopping at Fine.

Dal Segno: return to the sign

Dal Segno (Italian for from the sign) works like Da Capo but instead of returning to the absolute beginning, it returns to a point marked with the segno symbol. It is abbreviated D.S. The most common form is Dal Segno al Fine: return to the sign and play until Fine.

There is also Dal Segno al Coda: return to the sign, play until you find the Coda symbol, then jump directly to the Coda section. The Coda is an added final section, like an epilogue. In pop and jazz repertoire, the D.S. al Coda structure is extraordinarily common.

Reading order and musical form

When a score combines several signs, the navigation order can seem complex at first. The key is to read it like a map, not like a linear text. Before playing, experienced performers mentally trace the complete structure: they identify the repeat barlines, the endings, the segno, the Fine, and the Coda.

Repeat signs are not just a typographic convention: they are a way of thinking about music. A piece with an A-A-B-A structure is not four distinct sections; it is two sections, one of which repeats with variations. The signs make that architecture visible.

In the next post we will study the American chord symbol system, the notation that allows writing the harmony of a piece with a single letter — A, Bb, C#m7 — and which is the lingua franca of jazz, pop, and modern rock.

Repetition is the foundation of musical memory. Without it, there is no form; without form, there is no music, only sound. — Arnold Schoenberg