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Audit score

A new tool 'Audit score' is added to the multitool PYNWC: (version 1.3)

Before running this tool, be sure to select in the tool parameter window the audit you want to be performed.
Also specify the process mode: all staves, visible staves, active staff or the selection.
Depending on the audit you choose, additional options will be shown. See below for details per audit.

- Audit accidentals:
    Via the tool parameters you can select one of this options for handling natural accidentals:

        - Leave naturals unchanged
        - Make courtesy accidentals
        - Remove accidentals

    This audit acts on any unnecessary accidentals assigned to notes.
    It compares a note with an accidental with the 'running' key signature, which is determined by the previous key
    signature + the preceding accidentals in the measure.
    If the accidental matches the running signature, and it's not a courtesy accidental, it will be removed if it's
    not a natural.
    For naturals the action taken depends on the option in the tool parameters.

- Audit bar lines:
    Audits the bar line alignment.
    In the tool parameters you can indicate whether you want to admit a short first measure (anacrusis).
    If the audit finds a standard bar line that is not aligned properly, it is removed and a new bar line is added in
    the proper place. As a result, notes and chords can be split and tied.

    * Measures with a special ending that is not at the beginning of the measure, are not audited.

- Audit enharmonic spelling:
    Replaces notes with their enharmonic equivalents.
    There are several options you can choose from (see below), via the tool parameters.
    If your process mode = 'Process selection', and an enharmonic change is to be done on a note, the following notes
    in the same measure or which are tied to the changed note, are investigated to determine if they need to be changed
    also. If affirmative, they will be added to the selection.

    Available options:
     - 'No sharps': All sharps are replaced.
     - 'No flats': All flats are replaced.
     - 'Reverse sharps/flats'.
     - 'No doubles': All double sharps and double flats are replaced.
     - 'Preferably naturals': If a enharmonic equivalent without accidental is possible, it's used.
     - 'No forced naturals':
        If a natural accidental is caused by an preceding note with an accidental, this preceding note is replaced by
        its enharmonic equivalent.
     - 'Common preferred accidentals': A# -> Bb, Db -> C#, D# -> Eb, Gb -> F#, Ab -> G#.
     - 'Sharps up, flats down':
        If the next note is a tone or a semitone higher, a sharp is used; if it is a tone or a semitone lower, a flat is
        used (not applicable to chords and restchords).
     - 'Custom changes': You can choose one or more items from a list of all possible enharmonic changes.

- Audit note length and beaming:
    Splits notes and group beamings, according to the time signatures.
    Upon start, a window is shown with the default groupings for note length and beaming, for each found time signature.
    You can accept or modify them.

    The specifications mainly come from @hmmueler

    - Note, chord and rest lengths are distributed in each measure according to standard rules(see e.g. Elaine Gould, Behind Bars, pp. 160-164, 166-169, 171).

        * Rest chords, chords with different durations, triplets, or notes with a 'Staccato', 'Staccatissimo', 'Accent' or 'Marcato' articulations will not be split.

    - Beams connect notes and chords according to standard rules (see e.g. Elaine Gould, Behind Bars, pp. 153-155).

    - The main and secondary beat patterns are derived from the currently active time signature.

    - It 's possible to specify alternative beat patterns for a time signature, both for the note lengths and beams.

    - A long note that starts at a beat and spans over several beats, will not be split.

    - If the first measure of the score or selection is a short measure, it is treated as the right part of the full beat pattern.

    - When a special ending is found that's not at the beginning of the measure, the remaining of the measure is not audited.

    - A measure that is longer than the current time signature indicates causes an error message.

 - Audit note stems:
    Removes unnecessary stem up or down attributes and resets stem directions for note beams and triplets.

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