music21.converter.qmConverter

This is an example of how converter.subConverters.SubConverter can be subclassed in order to parse and write an unsupported format in this case, the format, .qm, consists of a line of letters separated by spaces:

C E G D F

and turns each of them into a quarter note in octave 4 in 4/4.

Consult the code to see how it works. To use, call converter.registerSubConverter(converter.qmConverter.QMConverter) then myStream = converter.parse(‘quarterMusic: C E G D F’)

QMConverter

class music21.converter.qmConverter.QMConverter(**keywords)

QMConverter bases

QMConverter read/write properties

Read/write properties inherited from SubConverter:

QMConverter methods

QMConverter.parseData(strData, number=None)

Parse the data. The number attribute is not used.

>>> from music21.converter.qmConverter import QMConverter
>>> qmc = QMConverter()
>>> qmc.parseData('C D E G C')
>>> q_stream = qmc.stream
>>> q_stream.show('text')
{0.0} <music21.stream.Measure 1 offset=0.0>
    {0.0} <music21.clef.TrebleClef>
    {0.0} <music21.meter.TimeSignature 4/4>
    {0.0} <music21.note.Note C>
    {1.0} <music21.note.Note D>
    {2.0} <music21.note.Note E>
    {3.0} <music21.note.Note G>
{4.0} <music21.stream.Measure 2 offset=4.0>
    {0.0} <music21.note.Note C>
    {1.0} <music21.bar.Barline type=final>
QMConverter.parseFile(filePath, number=None, **keywords)

parse a file from disk. If QMConverter is registered, then any file ending in .qm will automatically be parsed.

>>> import os
>>> parserPath = common.getSourceFilePath() / 'converter'
>>> testPath = parserPath / 'quarterMusicTestIn.qm'

>>> from music21.converter.qmConverter import QMConverter
>>> qmc = QMConverter()
>>> qmc.parseFile(testPath)
>>> s = qmc.stream
>>> s.show('text')
{0.0} <music21.stream.Measure 1 offset=0.0>
    {0.0} <music21.clef.TrebleClef>
    {0.0} <music21.meter.TimeSignature 4/4>
    {0.0} <music21.note.Note C>
    {1.0} <music21.note.Note E>
    {2.0} <music21.note.Note G>
    {3.0} <music21.note.Note F>
{4.0} <music21.stream.Measure 2 offset=4.0>
    {0.0} <music21.note.Note E>
    {1.0} <music21.note.Note D>
    {2.0} <music21.note.Note C>
    {3.0} <music21.bar.Barline type=final>
QMConverter.write(obj, fmt, fp=None, subformats=(), **keywords)

Calls .writeDataStream on the repr of obj, and returns the fp returned by it.

Methods inherited from SubConverter: