Skip to main content
See: /MRS-Specification-RFC#4-4-metadata-section and /MRS-Specification-RFC#4-5-parts-section

​
Metadata Section

(meta
  :title "Symphony No. 5 in C Minor"
  :subtitle "Fate Knocking at the Door"
  :composers ["Ludwig van Beethoven"]
  :copyright "Public Domain"
  :created "1808"
  :modified "2025-12-12T10:30:00Z"
  
  ; Score-wide defaults
  :key C :mode minor
  :time 2/4
  :tempo 108
  :tempo-text "Allegro con brio")

​
Required Fields

FieldTypeDescription
:titlestringPrimary title of the work

​
Optional Fields

FieldTypeDescription
:subtitlestringSecondary title
:composers[string]List of composer names
:keypitch-classDefault key
:modekeywordmajor, minor, dorian, etc.
:timefractionDefault time signature
:tempointegerDefault tempo in BPM

​
Parts Section

(parts
  (part flute-1
    :name "Flute 1"
    :abbr "Fl. 1"
    :staves [treble]
    :section woodwinds
    :range [C4 D7])
  
  (part clarinet-bb
    :name "Clarinet in B♭"
    :abbr "Cl."
    :staves [treble]
    :section woodwinds
    :transposition (down M2)
    :range [D3 Bb6])
  
  (part piano
    :name "Piano"
    :abbr "Pno."
    :staves [treble bass]
    :section keyboards
    :staff-connect brace))

​
Part Attributes

AttributeRequiredDescription
:nameYESFull display name
:abbrYESAbbreviated name
:stavesYESList of staff clefs
:sectionNOInstrument family
:transpositionNOTransposition interval
:rangeNOPlayable range