FLTVOL constants defined by the shapefiltvolcontext.h file.
SHAPE_FILTVOL_MAX_FREQUENCY
SHAPE_FILTVOL_MAX_GAIN
SHAPE_FILTVOL_MAX_Q
SHAPE_FILTVOL_MIN_FREQUENCY
SHAPE_FILTVOL_MIN_GAIN
SHAPE_FILTVOL_MIN_Q
SHAPE_FILTVOL_UPDATE_FC
SHAPE_FILTVOL_UPDATE_FC_TARGET
SHAPE_FILTVOL_UPDATE_GAIN
SHAPE_FILTVOL_UPDATE_GAIN_TARGET
SHAPE_FILTVOL_UPDATE_HEADROOM
SHAPE_FILTVOL_UPDATE_MASK
SHAPE_FILTVOL_UPDATE_Q_RECIP
SHAPE_FILTVOL_UPDATE_Q_RECIP_TARGET
SHAPE_FILTVOL_UPDATE_SVF_MODE