Listener Volume Offset

Question

chapter Volume Offset and Spatialization

"... a vector that contains the attenuation, in dB, for each channel on that listener. If in_bSpatialized is False, then it sets the volume for each channel, which are 0 dB by default. If in_bSpatialized is True, it offsets the volume computed by default 3D spatialization computation by a given amount for each channel."

I would like to clarify: does this mean that if Spatialization is set to 'true' - then the pre-channel output attenuation can not be set/changed? Is it possible when 'false' is only set?

Or vice versa? Or in both variants?