I am trying to use vDSP with Swift 3, but I still do not understand how to take care of an UnsafeRawPointer type correctly.
You can add an interactive live view to the assistant editor of your playground. Choose:
View > Assistant Editor > Show Assistant Editor
to add the assistant editor to the playground.
You can try your Swift program that import AudioKit on a playground to get the immediate result including the sound output.
If you hear no sound, please check your Playground Settings to see if the Platform is correct for your environment by:
View -> Utilities -> Show file inspector