If you are looking for my website, I don't know why the link didn't appear in the blog post, here it is: http://www.ogsoundfx.com/

Nice tutorial. I would note that for games you really want the engine handling the Doppler effect. If you bake the effect in the sound you limit the possibilities for that sound to a single event and any further timing changes to that event becomes a nightmare.

Link for Doppler node in Unreal Engine 4:  
https://docs.unrealengine.com/latest/INT/Engine/Audio/SoundCues/NodeReference/#dopplernode

Link for Unity: 
https://docs.unity3d.com/Manual/class-AudioManager.html (See 'Doppler Factor' property)

Sorry, just saw your message. You are absolutely right ! And that goes for all kinds of effects. Reverbs, spatial localization and so on.

Thanks for your input !