Since version 0.4, you have the ability to record voice clips and launching them using the Audio action.
Access recording in V0.4 and V0.5:
To access the Audio recording function, make sure you are in Edit mode and no panel is open (press X to close any panel open). Press A (microphone icon on your Right controller).
Access recording in V0.5.1:
In this version there is a Sound section inside the Library. To access the Audio recording function, open Main Menu > Assets > Sound (on the top-right tabs). Then simply add a New Recording.
At this point, a microphone should have appeared on your right controller. Press and hold the trigger to record an audio clip. A message asking you to allow access to the microphone might appear; choose OK. Release the trigger when you’re done (max 40 s per recording). Record as many audio as needed in your experience. To launch an audio clip, create an Interaction using the Audio action.
Exit the Audio recording function by pressing X (Back).