The following links point to various pre-defined representations
in Humdrum.
N.B. Users are free to create their own Humdrum representations,
and need not use the representations described here.
Further information about the
**documentation style**
is available.

barlines | "common system" for representing barlines |

**bhatk | Bhatkhande system for transcribing Hindustani music |

**cents | absolute pitch representation in hundredths of semitones |

**correl | statistical correlation representation |

**date | absolute time representation (year, month, day, hour, minute, second ...) |

**dB | relative amplitude representation |

**deg | relative scale degree representation |

**degree | absolute scale degree representation |

**diss | sensory dissonance representation |

**dur | duration (time-span) representation |

**embel | representation for embellishment tones |

**freq | frequency representation |

**fret | generalized fretted tablature representation |

**harm | representation for Western functional harmony |

**hildegard | square notation representation |

**hint | harmonic interval representation |

**IPA | representation for International Phonetic Alphabet |

**iv | interval vector representation |

**kern | core pitch/duration representation for common practice music notation |

**melac | melodic accent representation |

**metpos | position in metric hierarchy |

**MIDI | Musical Instrument Digital Interface notation |

**mint | melodic interval representation |

**ordo | sequential order of events representation |

**pc | pitch-class representation |

**pcset | Fortean pitch-class set representation |

**pitch | American National Standards Institute pitch notation |

**recip | beat-proportion representation |

**semits | semitone absolute pitch representation |

**simil | similarity representation |

**solfa | representation for tonic solfa syllables |

**solfg | French solfège (pitch) notation |

**specC | spectral centroid representation |

**spect | discrete frequency spectrum representation |

**synco | represent degree of metric syncopation |

**takt | beat-position representation |

**text | vocal text representation |

**time | relative elapsed time (in seconds) |

**Tonh | German Tonh\o'o\(..'he (pitch) notation |

**URrhythm | represent Johnson-Laird beat prototypes for a passage |

**vox# | representation of number of concurrently active voices |

**Zeit | absolute period of time |