def relative_vals(triplet_of_minims, modusmaior, modusminor, tempus, prolatio):
    """
    Return a list of the (default) performed duration of the notes on one voice according to the mensuration of the voice and the presence/absence of triplet of minims.

    Arguments:
    modusmaior, modusminor, tempus, prolatio -- integer values (3 or 2) that give the mensuration of the voice
    triplet_of_minims -- boolean flag that indicates the presence of a 'triplet of minims' in the piece (all voices)

    Return value:
    List of the default performed duration of the notes in the following order: semibreve, breve, long and maxima.
    """
    if triplet_of_minims:
        semibrevis_default_val = 1024
    else:
        # minima_default_val = 512
        semibrevis_default_val = prolatio * 512
    brevis_default_val = tempus * semibrevis_default_val
    longa_default_val = modusminor * brevis_default_val
    maxima_default_val = modusmaior * longa_default_val

    return [semibrevis_default_val, brevis_default_val, longa_default_val, maxima_default_val]