=:|! double barline with repeat, normal/heavy lines =29- beginning of measure 29, no barline drawn =29` beginning of measure 29, rendered with partial barline (top) =' unnumbered barline, rendered with partial barline (mid) =:||: barline with left and right repeats, two normal-width lines =:|: barline with left and right repeats, normal line width =29| beginning of measure 29, normal line width =|! double barline, normal line followed by heavy line =29c third occurrence of measure 29 with pause =29 the beginning of measure 29 with pause Several examples of 'common system' barlines are given below: The following table summarizes the mappings of signifiers andĠ-9 measure numbers a-z alternate measures pause = barline = double barline | normal width visual rendering ! heavy width visual rendering ' partial barline (from second to fourth line) ` partial barline (short stroke at top of staff) - invisible barline repeat sign Repetition.) All of these visual signifiers may be combined to formĬomplex visual representations, such as a triple barline consisting ofĪ normal line, followed by a heavy line, followed by a normal line,įollowed by a repeat indicator. Section labels (3) and thru (4) for information concerning Visual signifier, rather than a logical signifier of repetition see The repeat sign isĭenoted by the colon character :). Pointing left, right, or in both directions. InĪddition, barlines may be associated with repetition marks. 'Invisible' barlines are signified by the minus sign ( -). Of the staff) are signified by the single greve character ( `). Partial barlines (rendered as a short vertical stroke across the top Partial barlines (extending between the second andįourth lines) are signified by the single quote character ( '). Dotted barlines are signified by the double quoteĬharacter ( '). Heavy barlines are signified by the exclamation Barlines of normal width are represented by the addition of the WhereĪppropriate, users can specify more precisely the notationalĪppearance of the barline by appending additional signifiers to theīasic signifiers identified above. It, while the token = ` means that a double barline contains aīarlines can be visually rendered in a variety of ways. Thus the token ` =4 means that theīarline starting measure number 4 has a pause written above or below =).`Īn additional attribute for barlines is the pause - which is Several consecutive equals signs may be encoded in The token =23` occurs just prior to the encoded data for measure 23.ĭouble barlines are indicated by a minimum of two successive equals Numbers refer to the measure immediately following the barline, thus This convention permits the user toĭistinguish measure numbers for first and second endings, etc. InĪddition, a lower-case alphabetic character may be appended to the ImmediatelyĪfter the equals sign there may follow an optional integer value Barlines are logically signified by the presence ofĪn equals-sign ` (=) in the first column of a spine. With optional signifiers for specifying the precise visual appearance In the common system, barlines are represented as logical entities, This common system is not intended to preclude other ways of Several Humdrum representations employ a common system for Selecting Musical Parts and Passagesīarlines - 'common system' for representing barlines DESCRIPTION

Music bar lines