librosa/core/time_frequency.py
def note_to_midi(note, round_midi=True):
    '''Convert one or more spelled notes to MIDI number(s).

    Notes may be spelled out with optional accidentals or octave numbers.

    The leading note name is case-insensitive.

    Sharps are indicated with ``#``, flats may be indicated with ``!`` or ``b``.

    Parameters
    ----------
    note : str or iterable of str
        One or more note names.

    round_midi : bool
        - If `True`, allow for fractional midi notes
        - Otherwise, round cent deviations to the nearest note

    Returns
    -------
    midi : float or np.array
        Midi note numbers corresponding to inputs.

    Raises
    ------
    ParameterError
        If the input is not in valid note format

    See Also
    --------
    midi_to_note
    note_to_hz

    Examples
    --------
    >>> librosa.note_to_midi('C')
    12
    >>> librosa.note_to_midi('C#3')
    49
    >>> librosa.note_to_midi('f4')
    65
    >>> librosa.note_to_midi('Bb-1')
    10
    >>> librosa.note_to_midi('A!8')
    116
    >>> # Lists of notes also work
    >>> librosa.note_to_midi(['C', 'E', 'G'])
    array([12, 16, 19])

    '''

    if not isinstance(note, six.string_types):
        return np.array([note_to_midi(n, round_midi=round_midi) for n in note])

    pitch_map = {'C': 0, 'D': 2, 'E': 4, 'F': 5, 'G': 7, 'A': 9, 'B': 11}
    acc_map = {'#': 1, '': 0, 'b': -1, '!': -1}

    match = re.match(r'^(?P<note>[A-Ga-g])'
                     r'(?P<accidental>[#b!]*)'
                     r'(?P<octave>[+-]?\d+)?'
                     r'(?P<cents>[+-]\d+)?$',
                     note)
    if not match:
        raise ParameterError('Improper note format: {:s}'.format(note))

    pitch = match.group('note').upper()
    offset = np.sum([acc_map[o] for o in match.group('accidental')])
    octave = match.group('octave')
    cents = match.group('cents')

    if not octave:
        octave = 0
    else:
        octave = int(octave)

    if not cents:
        cents = 0
    else:
        cents = int(cents) * 1e-2

    note_value = 12 * (octave + 1) + pitch_map[pitch] + offset + cents

    if round_midi:
        note_value = int(np.round(note_value))

    return note_value
def note_to_midi(note, round_midi=True):
    '''Convert one or more spelled notes to MIDI number(s).

    Notes may be spelled out with optional accidentals or octave numbers.

    The leading note name is case-insensitive.

    Sharps are indicated with ``#``, flats may be indicated with ``!`` or ``b``.

    Parameters
    ----------
    note : str or iterable of str
        One or more note names.

    round_midi : bool
        - If `True`, allow for fractional midi notes
        - Otherwise, round cent deviations to the nearest note

    Returns
    -------
    midi : float or np.array
        Midi note numbers corresponding to inputs.

    Raises
    ------
    ParameterError
        If the input is not in valid note format

    See Also
    --------
    midi_to_note
    note_to_hz

    Examples
    --------
    >>> librosa.note_to_midi('C')
    12
    >>> librosa.note_to_midi('C#3')
    49
    >>> librosa.note_to_midi('f4')
    65
    >>> librosa.note_to_midi('Bb-1')
    10
    >>> librosa.note_to_midi('A!8')
    116
    >>> # Lists of notes also work
    >>> librosa.note_to_midi(['C', 'E', 'G'])
    array([12, 16, 19])

    '''

    if not isinstance(note, six.string_types):
        return np.array([note_to_midi(n, round_midi=round_midi) for n in note])

    pitch_map = {'C': 0, 'D': 2, 'E': 4, 'F': 5, 'G': 7, 'A': 9, 'B': 11}
    acc_map = {'#': 1, '': 0, 'b': -1, '!': -1}

    match = re.match(r'^(?P<note>[A-Ga-g])'
                     r'(?P<accidental>[#b!]*)'
                     r'(?P<octave>[+-]?\d+)?'
                     r'(?P<cents>[+-]\d+)?$',
                     note)
    if not match:
        raise ParameterError('Improper note format: {:s}'.format(note))

    pitch = match.group('note').upper()
    offset = np.sum([acc_map[o] for o in match.group('accidental')])
    octave = match.group('octave')
    cents = match.group('cents')

    if not octave:
        octave = 0
    else:
        octave = int(octave)

    if not cents:
        cents = 0
    else:
        cents = int(cents) * 1e-2

    note_value = 12 * (octave + 1) + pitch_map[pitch] + offset + cents

    if round_midi:
        note_value = int(np.round(note_value))

    return note_value
Convert one or more spelled notes to MIDI number(s).

    Notes may be spelled out with optional accidentals or octave numbers.

    The leading note name is case-insensitive.

    Sharps are indicated with ``#``, flats may be indicated with ``!`` or ``b``.

    Parameters
    ----------
    note : str or iterable of str
        One or more note names.

    round_midi : bool
        - If `True`, allow for fractional midi notes
        - Otherwise, round cent deviations to the nearest note

    Returns
    -------
    midi : float or np.array
        Midi note numbers corresponding to inputs.

    Raises
    ------
    ParameterError
        If the input is not in valid note format

    See Also
    --------
    midi_to_note
    note_to_hz

    Examples
    --------
    >>> librosa.note_to_midi('C')
    12
    >>> librosa.note_to_midi('C#3')
    49
    >>> librosa.note_to_midi('f4')
    65
    >>> librosa.note_to_midi('Bb-1')
    10
    >>> librosa.note_to_midi('A!8')
    116
    >>> # Lists of notes also work
    >>> librosa.note_to_midi(['C', 'E', 'G'])
    array([12, 16, 19])