Numbered musical notation

The numbered musical notation is a cipher notation system used in mainland China, Taiwan, Hong Kong, and to some extent in Japan, Indonesia, Malaysia, Australia, Ireland, the United Kingdom, the United States and English-speaking Canada. It dates back to the system designed by Pierre Galin, known as Galin-Paris-Chevé system. It is also known as Ziffernsystem, meaning "number system" or "cipher system" in German.

Description

Musical notes

Numbers 1 to 7 represent the musical notes. They always correspond to the diatonic major scale. For example, in the key of C, their relationship with the notes and the solfège is as follows:
In G:
When the notes are read aloud or sung, they are called "do, re, mi, fa, sol, la, si".

Octaves

Dots above or below a musical note raise or lower it to other octaves. The number of dots equals the number of octaves. For example, "" is an octave lower than "6". Musical scales can thus be written as follows:
Where there is more than one dot above or below the number, the dots are vertically stacked:
Where there are note length lines underneath the numbers, any dots are placed below the lines. Thus the dots below numbers do not always vertically align with each other, since some of them may be moved slightly downward so as not to collide with the note length lines.

Chords

Chords can be transcribed by vertically stacking the notes, with the lowest note at the bottom as with Western notation. Each note has its own octave dots, but only the lowest note has the length lines.
Arpeggiated chords are notated by writing the standard Western arpeggiation symbol to the left of the chord.
Chord symbols such as Cm may be used if the exact voicing is unimportant.

Note length

The plain number represents a quarter note. Each underline halves the note length: One represents an eighth note, two represent a sixteenth note, and so on. Dashes after a note lengthen it, each dash by the length of a quarter note.
A dot after the plain or underlined note works increases its length by half, and two dots by three quarters.
The underline, along with its joining, are analogous to the number of flags and beaming in standard notation. So are dotted notes.

Whole		Dotted whole		Double dotted
Half	1 ‒	Dotted half	1 ‒ ‒	Double dotted	1 ‒ ‒ 1
Quarter	1	Dotted quarter	1•	Double dotted	1••
Eighth	1	Dotted eighth	1•	Double dotted	1••
16th

Musical rest

The number "0" represents the musical rest. The rules for length is similar to that of the note, except that it is customary to repeat "0" instead of adding dashes for rests longer than a quarter rest. The bar rest of time is | 0 0 0 | and the bar rest of time is | 0 0 0 0 |. A more general symbol for a bar rest is | )0( |. The multi-bar rest symbol used in standard notation may also be adopted.

Undetermined pitch

When notating rhythms without pitch, such as in many percussion instruments, the symbol "X" or "x" replaces numerals. For example, a common clap pattern used in cheers can be written like this:
4/4
Clap: | X X X X X | X X X X 0 ||

Bar lines

Bar lines, double bar lines, end bar lines, repeat signs, first- and second-endings look very similar to their counterparts in the standard notation. The ending numbers, though, are usually slightly less than half as big as the numerals representing notes.
When several lines of music are notated together to be sung or played in harmony, the bar lines usually extend through all the parts, except they do not cut across the lyrics if these are printed between the upper and lower parts. However, when notating music for a two-handed instrument, it is common for the bar lines of each hand to be drawn separately, but a score bracket to be drawn on the left of the page to "bind" the two hands together. This bracket is not the same as the bracket used on a Western piano staff; it's more like the bracket used to bind an orchestral section together in Western music. Sometimes the final double barline, and any barlines marked with repeat signs, also pass through both hands, but this is not consistent even in the same publication.
If a piece of music for a two-handed instrument has a passage where only one hand is notated, lines of numbered notation without score brackets at the left can be used for this passage. Hence a piece of music may shift between two-handed and one-handed layouts during the course of the piece.
Cadenza-like passages can have dotted barlines, or barlines can be omitted altogether.
It is possible to print a small fermata above a bar line; this represents a brief pause between the measures either side of the barline, as in Western notation.

Accidentals and key signature

The notation uses a movable Do system. The key signature defines the pitch of "1". So 1=C means "C major". Minor keys are based on the natural minor or the Aeolian mode, and the key signature defines the pitch of "6" of the minor key's relative major. 6=A can be used to refer to A minor, the tonic of which is written as 6. Naturally, the Dorian mode of D can in principle be marked as 2=D and based on 2. In common practice, however, either are normally denoted as 1=C.
The same accidentals in the standard notation are used, and as in common practice, an accidental is placed before the notes "1 2 3 4 5 6 7" to raise or lower the pitch and placed after the note names "C D E F G A B", which are used for key signature and chord markings in the numbered system. But these accidentals are relative to the diatonic scale rather than the note names. For example, even though the leading note for the harmonic C minor scale is B natural, it is written as "5".
In the Indonesian version of numbered musical notation known as "not angka", accidentals are notated using right slanted line to raise the tone a half step and left slanted line to lower the tone a half step, for example: 1/ read as C, 2/ read as D, 4/ read as F, 5/ read as G, 6/ read as A, 2\ read as D, 3\ read as E, 5\ read as G, 6\ read as A and 7\ read as B. In printed not angka, these lines are overprinted on the figures.
Key signature changes are marked above the line of music. They may be accompanied by symbols that represent the note's degrees at previous and present key signatures.

Time signature

The time signature is written as a horizontal fraction: 2/4, 3/4, 4/4, 6/8, etc. It is usually placed after the key signature. Change of time signature within the piece of music may be marked in-line or above the line of music. Some pieces that start with cadenza passages are not marked with time signatures until the end of that passage, even if the passage uses dotted barlines.
Sometimes a piece is written with multiple time signatures simultaneously. For example, it might specify 4/4 2/4 3/4 5/4, meaning that the length of measures is irregular and can be 4, 2, 3 or 5 quarter-notes. The time signature of the first measure is always specified first, and the others are placed in increasing order of length.
Usually, the time signature is formatted as two numbers placed vertically on top of each other, with a horizontal line separating them. This is slightly different from the formatting illustrated in the text above, due to technical restrictions.
A metronome mark may be placed immediately after the time signature if the time signature is part-way through the music, or below it if the time signature is at the beginning. If present, this will be identical to the metronome marks used in Western music.

Expression marks and dynamics

Expression marks are also written above the music line. Special attention has to be paid on the staccato dot since it looks like the octave changer. It is either represented by a bolder dot further away from the music line or by the staccatissimo sign instead, which is an inverted triangle.
Dynamics and hairpin crescendos and diminuendos are written below the line of music to which they apply, as in Western notation. The font of the dynamics is usually lighter than the font used in Western notation, so as not to be as heavy as the font for the numbers.

Fingering and other instrument-specific marks

Instrument-specific symbols can be written above notes. For example, in music for stringed instruments it is common to see wavy lines representing rolls. Fingering can be marked using four different kinds of finger symbol, respectively appearing like a lightning strike, the top half of a semicircle, a backslash, and the bottom left corner of a square.
Other instrument-specific symbols that are sometimes used include one resembling three slashes progressing diagonally downward, placed to the lower right of the numeral. This represents a tremolo. Another symbol is formed of a line proceeding from slightly to the right of the top right corner of the numeral and curving upwards, ending with the left half of an arrowhead. This denotes a slide to a higher note, equivalent to portamento in Western music.
If there are slurs or ties and also fingering symbols, then the fingering symbols are written above the slurs or ties. Rolls and tuplets are usually written below the slurs or ties. However, if a one-off chord results in many digits being stacked on top of each other and also has a roll symbol, it is possible to place that roll symbol above any slur or tie line to save space.