Crate music21_rs 

Rust helpers inspired by selected parts of Python’s music21.

The crate currently focuses on pitch construction, chord naming and lightweight theory utilities such as polyrhythm and tuning-system helpers.

Re-exports

pub use abc::abc_chord;

pub use abc::abc_duration;

pub use abc::abc_note;

pub use abc::abc_rest;

pub use abc::pitch_name_from_abc_note;

pub use abc::pitch_names_from_abc_chord;

pub use analysis::KeyEstimate;

pub use analysis::KeyProfile;

pub use analysis::estimate_key_from_chords;

pub use analysis::estimate_key_from_chords_with;

pub use analysis::estimate_key_from_pitches;

pub use analysis::estimate_key_from_pitches_with;

pub use analysis::tonal_certainty;

pub use analysis::tonal_certainty_from_scores;

pub use chord::Chord;

pub use chord::ChordResolutionSuggestion;

pub use chord::ChordTableAddress;

pub use chord::GuitarFingering;

pub use chord::GuitarStringFingering;

pub use chord::GuitarTuning;

pub use chord::GuitarTuningString;

pub use chord::IntoNotes;

pub use chord::KnownChordType;

pub use chord::TriadQuality;

pub use chord::format_vector_string;

pub use chordsymbol::ChordAlteration;

pub use chordsymbol::ChordQuality;

pub use chordsymbol::ChordSymbol;

pub use chordsymbol::Music21ChordType;

pub use chordsymbol::chord_symbol_figure_from_chord;

pub use chordsymbol::chord_symbol_from_chord;

pub use chordsymbol::known_chord_symbol_types;

pub use duration::Duration;

pub use duration::DurationType;

pub use duration::Tuplet;

pub use duration::quarter_length_to_closest_type;

pub use error::Error;

pub use error::Result;

pub use harte::Harte;

pub use harte::HarteInterval;

pub use harte::SHORTHAND_DEGREES;

pub use harte::convert_interval;

pub use interval::ChromaticInterval;

pub use interval::DiatonicInterval;

pub use interval::GenericInterval;

pub use interval::Interval;

pub use interval::IntervalDirection;

pub use interval::Specifier;

pub use interval::absolute_higher_pitch;

pub use interval::absolute_lower_pitch;

pub use interval::convert_diatonic_number_to_step;

pub use interval::convert_generic;

pub use interval::convert_semitone_to_specifier_generic;

pub use interval::convert_semitone_to_specifier_generic_microtone;

pub use interval::intervals_to_diatonic;

pub use interval::notes_to_chromatic;

pub use interval::notes_to_generic;

pub use interval::parse_specifier;

pub use interval::staff_distance_to_generic_number;

pub use interval::written_higher_pitch;

pub use interval::written_lower_pitch;

pub use key::Key;

pub use key::KeySignature;

pub use key::convert_key_string_to_music21_key_string;

pub use meter::BeamedNote;

pub use meter::BeatDivision;

pub use meter::MeterTerminal;

pub use meter::OffsetAlign;

pub use meter::TimeSignature;

pub use midi::DEFAULT_TICKS_PER_QUARTER;

pub use midi::MidiNote;

pub use midi::midi_notes_from_stream;

pub use midi::read_midi_bytes;

pub use midi::read_midi_bytes_with_tempo;

pub use midi::stream_from_midi_notes;

pub use midi::write_midi_bytes;

pub use notation::Beam;

pub use notation::BeamDirection;

pub use notation::BeamType;

pub use notation::Beams;

pub use notation::Lyric;

pub use notation::Notehead;

pub use notation::Placement;

pub use notation::StemDirection;

pub use notation::Syllabic;

pub use notation::Tie;

pub use notation::TieStyle;

pub use notation::TieType;

pub use note::IntoNote;

pub use note::Note;

pub use pitch::Accidental;

pub use pitch::AccidentalAttribute;

pub use pitch::AccidentalDisplayOptions;

pub use pitch::AccidentalSpecifier;

pub use pitch::CHROMATIC_PITCH_CLASS_NAMES;

pub use pitch::Microtone;

pub use pitch::MicrotoneSpecifier;

pub use pitch::Pitch;

pub use pitch::PitchClass;

pub use pitch::PitchClassSpecifier;

pub use pitch::PitchName;

pub use pitch::PitchOptions;

pub use pitch::convert_pitch_class_to_str;

pub use pitch::dissonance_score;

pub use pitch::pitch_class_name;

pub use pitch::simplify_multiple_enharmonics;

pub use polyrhythm::Polyrhythm;

pub use polyrhythm::PolyrhythmAnalysis;

pub use polyrhythm::PolyrhythmEvent;

pub use polyrhythm::PolyrhythmRatioTone;

pub use rest::Rest;

pub use roman::roman_numeral_from_chord;

pub use roman::ImpliedQuality;

pub use roman::Minor67Default;

pub use roman::NumeralAlone;

pub use roman::RomanNumeral;

pub use roman::analyze_chord;

pub use roman::analyze_chord_with_root;

pub use roman::identify_as_tonic_or_dominant;

pub use roman::roman_inversion_name;

pub use scale::BluesForm;

pub use scale::DegreeComparison;

pub use scale::DiatonicScale;

pub use scale::Scale;

pub use scale::ScaleType;

pub use scale::SolfegVariant;

pub use scale::StepScale;

pub use scale::WeightedHexatonicBlues;

pub use serial::HISTORICAL_ROWS;

pub use serial::HistoricalRow;

pub use serial::IndexedTransformation;

pub use serial::LinkClassification;

pub use serial::ToneRow;

pub use serial::Transformation;

pub use serial::TransformationConvention;

pub use serial::TwelveToneMatrix;

pub use serial::historical_row_by_name;

pub use serial::row_to_matrix;

pub use sieve::Sieve;

pub use stream::Stream;

pub use stream::StreamElement;

pub use stream::StreamEvent;

pub use stream::StreamKind;

pub use tempo::DEFAULT_TEMPO_VALUES;

pub use tempo::MetronomeMark;

pub use tempo::convert_tempo_by_referent;

pub use tuningsystem::ALL_TUNING_SYSTEMS;

pub use tuningsystem::COMMON_EQUAL_TEMPERAMENTS;

pub use tuningsystem::COMMON_TWELVE_TONE_TUNING_SYSTEMS;

pub use tuningsystem::EqualDivision;

pub use tuningsystem::Fraction;

pub use tuningsystem::HISTORICAL_TEMPERAMENTS;

pub use tuningsystem::Monzo;

pub use tuningsystem::Mos;

pub use tuningsystem::MosScale;

pub use tuningsystem::OCTAVE_CENTS;

pub use tuningsystem::TRITAVE_CENTS;

pub use tuningsystem::Temperament;

pub use tuningsystem::TuningSystem;

pub use tuningsystem::Val;

pub use tuningsystem::moment_of_symmetry_sizes;

pub use tuningsystem::scala::ScalaArchive;

pub use tuningsystem::scala::ScalaDegree;

pub use tuningsystem::scala::ScalaScale;

pub use voiceleading::MotionType;

pub use voiceleading::VoiceLeadingQuartet;

pub use volume::Volume;

Modules

abc

ABC notation export helpers. ABC notation format helpers.

analysis

Key-finding and compact analysis helpers.

chord

Chord construction, common-name analysis and chord input conversion traits.

chordsymbol

Lead-sheet chord-symbol parsing.

duration

Rhythmic duration primitives.

error

Error and result types used by the crate.

figuredbass

Figured bass: the numbers written under a bass note. Figured bass: the numbers written under a bass note, and what they mean.

harte

Harte chord notation: C:maj7/3, Bb:(b3,5,b7,9), N. Harte chord notation, as read by harte-library: C:maj7/3, Bb:(b3,5,b7,9), F:sus4(*3,9), N.

interval

Public interval parsing, naming and transposition helpers.

key

Public key and key-signature helpers.

meter

Time signatures: bar length, beat count, beat length and beat division. Time signatures, ported from music21’s meter package.

midi

Minimal MIDI import/export helpers.

notation

Ties, noteheads, stem direction, colour, lyrics and beams. Notation attached to a note or a chord: ties, noteheads, stem direction, colour and lyrics.

note

Note construction and pitch access helpers.

pitch

Pitch construction, spelling and pitch-space helpers.

polyrhythm

Polyrhythm timing and pitch-set helpers.

rest

Silent duration-bearing musical event.

roman

Roman numeral parsing and compact harmonic analysis.

scale

Public scale helpers.

serial

Tone rows, twelve-tone matrices and serial transformations. Tone rows and twelve-tone serial transformations, a port of music21’s serial module.

sieve

Xenakis sieves, ported from music21’s sieve module.

stream

Small ordered timeline container. Music on a timeline: music21’s stream.Stream and the subclasses it nests inside one another.

tempo

Metronome marks and tempo-word conventions. Metronome marks, a port of the stream-free part of music21’s tempo.

tuningsystem

Tuning-system ratios, labels and frequency helpers.

voiceleading

Two-voice voice-leading classification and parallel-interval checks. Two-voice voice-leading checks, a port of music21’s VoiceLeadingQuartet.

volume

How loud a note is: music21’s volume.Volume.

Type Aliases

FloatType

Floating-point type used for pitch space, quarter lengths, and frequencies.

FractionType

Fraction type used by ratio and interval helpers.

IntegerType

Signed integer type used by music21-rs APIs.

Octave

Optional octave number, matching music21’s absent-octave representation.

UnsignedIntegerType

Unsigned integer type used by count-like music21-rs APIs.