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When this happens, the bar line will still appear at the end of the completed measure.

Instrumental lines snake over bar lines, intersecting in convoluted ways.

As in “Mass,” Bernstein changes idioms by the minute and rhythms, to Broadway’s dismay, by the bar line.

For hundreds of years, Western composers have used bar lines to subdivide a piece of music.

A wood bar lines the perimeter, offering socialization for you as well.