Doppler affect switcheroo?

[Evil.Bonsai]

Just noticed, but it seems that doppler affects of approaching vehicles is not pitch-shifted as you'd expect but rather the sound file is sped up slowed down to achieve the sound change. Not really noticeable in most vehicles, but helicopters are easy to spot it. Instead of changing pitch, the whup-whup-whup increases or decreases as you approach or move away. It should be pitch change only, but as it is, if you move fast enough away, it sounds like the rotor blades are slowing to a stop.

 

I'm sure this isn't a bug, exactly, just a way of coding the pitch changes. Just thought it was interesting when I noticed it.

 

:)

[Corrigan]

That's exactly what should happen.

 

Also, it's 'effect'. ;)

[Evil.Bonsai]

Weird. I had though otherwise, but now, not so much.

 

Guess I didn't think it through enough. I now see that as you approach the sound at a faster rate, you increase the frequency you contact the sound pulses (whup-whups), and thus the speeded up sound. I was just thinking it was a change in pitch without thinking WHY it was changing...

 

Thanks :)

[Corrigan]

That's exactly it, now you get it!