成员的完整列表，这些成员属于 FAtomExternalSoundParameters,包括所有继承而来的类成员

ExPlayer	FAtomExternalSoundParameters
ExVoicePool	FAtomExternalSoundParameters
NumChannels	FAtomExternalSoundParameters
PcmFilterFunction	FAtomExternalSoundParameters
SampleRate	FAtomExternalSoundParameters