Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: Lower Hz
SOUNDPROBESUBCHANNEL_LEFT
Parameter: Upper Hz
SOUNDPROBESUBCHANNEL_RIGHT
Parameter: Max Volume
SOUNDPROBESUBCHANNEL_TOP
Parameter: Min Volume
SOUNDPROBESUBCHANNEL_BOTTOM
Parameter: Color Mode
SOUNDPROBESUBCHANNEL_COLOR_MODE
Parameter: Color
SOUNDPROBESUBCHANNEL_COLOR
Parameter: Gradient
SOUNDPROBESUBCHANNEL_GRADIENT
Parameter: Hold
SOUNDPROBESUBCHANNEL_HOLD