Issues

• chordToXml sorts a copy of the chord and discards it

  cuthbertLab/music21#2055 · Filter by author float3 opened on Oct 2, 2026
  3

• preferSecondaryDominants=True relabels diatonic chords (tonic I → V/IV), contrary to the documented condition

  cuthbertLab/music21#2053 · Filter by author christopherlwerner opened on Oct 2, 2026
  3

• MIDI import: makeTies()/makeMeasures() permanently desyncs later note offsets by whole bars when simultaneous notes of different length collide

  cuthbertLab/music21#2020 · Filter by author JackyChanMusic opened on Sep 1, 2026
  2

• Slur bezier-x/y from start element gets overwritten by stop element's values

  cuthbertLab/music21#2019 · Filter by author adam1xz opened on Aug 31, 2026
  1

• Discussion/Proposal: Pitches always have accidentals

  cuthbertLab/music21#2010 · Filter by author mscuthbert opened on Aug 24, 2026
  4

• Discussion/Proposal: StreamCore to Stream.core

  cuthbertLab/music21#2008 · Filter by author mscuthbert opened on Aug 24, 2026
  3

• Humdrum: section-structured kern file parses to 8 of 69 measures (silent truncation)

  cuthbertLab/music21#1987 · Filter by author jpsmith8488 opened on Jul 22, 2026
  1

• Keyboard braille: extractHeading passes a KeySignature where a TimeSignature is expected (isinstance tested on the container)

  cuthbertLab/music21#1986 · Filter by author jpsmith8488 opened on Jul 22, 2026
  1

• Keyboard braille: a measure wider than one line aborts the whole transcription (no measure division, unlike the single-part path)

  cuthbertLab/music21#1985 · Filter by author jpsmith8488 opened on Jul 22, 2026
  1

• Split dotGroups to its own subclass

  enhancement
  cuthbertLab/music21#1969 · Filter by author mscuthbert opened on Jul 1, 2026

• chordSymbolFigureFromChord fails to identify RomanNumeral with sus4 or 7sus4 figures (missing 5th)

  cuthbertLab/music21#1866 · Filter by author dszeto opened on Feb 27, 2026
  4

• Make measures in incomplete parts either in MIDI parsing or MusicXML export

  enhancement
  cuthbertLab/music21#1857 · Filter by author jacobtylerwalls opened on Jan 25, 2026
  

• MIDI import only detects overlaps from same start time (rather than same end time also)

  cuthbertLab/music21#1856 · Filter by author palpatim opened on Jan 19, 2026
  4

• Tuplet and Parenthesis Handling Issues in ABC converter (abcFormat)

  cuthbertLab/music21#1798 · Filter by author guang-yng opened on Jun 21, 2025

• Jupyter notebook midi player doesn't recognize MetronomeMark

  cuthbertLab/music21#1784 · Filter by author oxygen-dioxide opened on May 26, 2025
  7

• music21.midi.MidiEvent.getBytes() confuses SEQUENCER_SPECIFIC_META_EVENT (0x7F) with POLY_MODE_ON (also 0x7F)

  cuthbertLab/music21#1772 · Filter by author ptolemeow opened on May 6, 2025
  1

• Feature request: .getOffsetBySiteInSeconds in Music21Object

  enhancement
  cuthbertLab/music21#1771 · Filter by author oxygen-dioxide opened on Apr 29, 2025
  3

• (Optional) non-blocking calls of MuseScore to show/play musicxml output

  enhancement
  cuthbertLab/music21#1764 · Filter by author dvrehen opened on Apr 4, 2025
  2

• Pedal bounces can have different forms all within one PedalMark spanner

  enhancement
  cuthbertLab/music21#1763 · Filter by author gregchapman-dev opened on Apr 3, 2025
  7

• Ties and Triplets do not work together in TinyNotation

  cuthbertLab/music21#1733 · Filter by author mscuthbert opened on Sep 18, 2024
  

• Humdrum: Measure number restarts after fermata when in middle of measure

  cuthbertLab/music21#1730 · Filter by author gg-g opened on Sep 10, 2024

• How to Recognize and Count Chord Symbols Imported as Lyrics in MusicXML Using Music21?

  cuthbertLab/music21#1727 · Filter by author XuhongQiu opened on Aug 26, 2024
  1

• MusicXML writer: Ottavas that start or end in the middle of a multi-voice measure get the wrong notes from the other voices

  cuthbertLab/music21#1718 · Filter by author gregchapman-dev opened on Jun 21, 2024
  10

• Loading MusicXML file produces error

  cuthbertLab/music21#1714 · Filter by author j-w-moebius opened on May 29, 2024

• expandRepeats don't work as expected

  cuthbertLab/music21#1713 · Filter by author miniil opened on May 16, 2024
  3