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import music21


    

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%load_ext music21.ipython21.ipExtension


    

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from IPython.core.display import Image


    

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music21.environment.set('autoDownload', 'allow')


    

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music21.environment.set('musicxmlPath', r'C:\Program Files (x86)\MuseScore\bin\mscore.exe')
music21.environment.set('lilypondPath', r'C:\Program Files (x86)\LilyPond\usr\bin\lilypond.exe')


    

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score = music21.converter.parse('data/xml/Jos0301a.xml')


    

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Image(score.measures(1,3).write('lily.png'))


    

    
Out[7]:

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measure13 = score.measures(1,3)


    

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VL = music21.theoryAnalysis.theoryAnalyzer.getVLQs(measure13,0,1)


    

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VL[0]


    

    
Out[10]:





<music21.voiceLeading.VoiceLeadingQuartet v1n1=<music21.note.Note G> , v1n2=<music21.note.Note D>, v2n1=<music21.note.Note E>, v2n2=<music21.note.Note D>  

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VL[0].vIntervals


    

    
Out[16]:





[<music21.interval.Interval m-3>, <music21.interval.Interval P-8>]

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VL[0].hIntervals


    

    
Out[15]:





[<music21.interval.Interval P5>, <music21.interval.Interval M-2>]

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music21.musedata.base40.base40DeltaToInterval(-53)


    

    
Out[28]:





<music21.interval.Interval A-10>

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