You are using new instead of NewObject, in UE4 you can not use some vanilla C++ stuff like those operators, UObjects need their very own initialization. Try changing your code to:
USoundWaveProcedural* SoundStreaming = NewObject<USoundWaveProcedural>();
From 4.9 USoundWaveStreaming is also deprecated and replaced by USoundWaveProcedural.
If you a usage example check the CreateVoiceAudioComponent in the engine source.