def drc(y, sr, preset):

    return __sox(y, sr, 'compand', *PRESETS[preset])
Returns the number of layers within the data source.
dataset/ETHPy150Open bmcfee/muda/muda/deformers/sox.py/drc--crossover with--dataset/ETHPy150Open django/django/django/contrib/gis/gdal/datasource.py/DataSource.__len__