Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See page_maxonapi_getting_started_foundations_cinema_parameters.
Parameter: Amplitude
BUB_AMP
Parameter: Variation
BUB_AMPVAR
Parameter: Speed
BUB_PERIOD
Parameter: Variation
BUB_PERIODVAR
Parameter: Phase Variation
BUB_PHASEVAR
Parameter: On
IN_BUB_ON
Parameter: Animation Time
IN_BUB_ATIME