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In music, a repeat sign (𝄆, 𝄇) is a sign that indicates a section should be repeated. If the piece has one repeat sign alone, then that means to repeat from the beginning, and then continue on (or stop, if the sign appears at the end of the piece). A corresponding sign facing the other way indicates where the repeat is to begin. These are similar to the instructions da capo and dal segno.
When a repeat calls for a different ending, number brackets above the bars indicate which to play the first time (1), which to play the second time (2), etc. These are called "first-time bars" and "second-time bars," or "first and second endings." They are also known as "volta brackets" and have no limit to how many there can be.
The repeat signs are represented in Unicode:
|119046||1D106||𝄆||U+1D106 MUSICAL SYMBOL LEFT REPEAT SIGN|
|119047||1D107||𝄇||U+1D107 MUSICAL SYMBOL RIGHT REPEAT SIGN|
In Gregorian chant, a repeat is indicated by a Roman numeral following a section. This is common particularly in a Kyrie, where the lines followed by "iij" are to be repeated three times (corresponding to the correct liturgical form).
In shape-note singing, repeat signs usually have four dots, between each line of the staff. The corresponding sign to show where the repeat is from is either the same sign reversed (if it is at the beginning of a measure), or the dots themselves (if it is in the middle of a measure). First and second endings are given with just the numbers above the corresponding bars. Repeats notated at the beginning of a verse, or given with multiple lines of text per verse, are generally required; the repeats given for most songs of the final few lines are optional, and almost always used only for the final verse sung.
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