1 fish, 2 fish, red shift, blue shift

[Peaches]

In the very near future I'm going to do an audio drama. I have all of the tools and the basic knowhow to do this. I'll be using Audacity for special effects and Garage Band for the overall mixing.<BR>There is but one question I have!! (for now)<BR>How do you emulate red/blue shifts?

 

[Richard Berg]

You mean pitch shifting? Audacity should be able to do it.

 

[Peaches]

I meant the doppler effect. If you can do a doppler effect with pitch shifting I'd love to learn.

 

[Targ8ter]

It should be easy if you can pitch-shift along a curve. I can't remember if Audacity does this, but it's pretty simple. You just pitch it high first, then as the sound passes you by you pitch it down. Then all you have to do is tweak the curve until it sounds believable. Invariably, you will find yourself saying "neeeie-eaooowowww!!" several times while trying to nail the timing. This is actually the most important part of the process. -- View image here: http://episteme.meincmagazine.com/groupee_common/emoticons/icon_wink.gif --

 

[xmetal2001]

I'm not familiar with Audacity, but Adobe Audition has a effect where you can manipulate a sound by setting on a graph the movement of the sound relative to the listeners 'position', creating a doplar effect. Perhaps audacity has a similar feature or plugin.

 

[tribble]

The frequency perceived by a listener listening to something going by follows a sine-wave pattern. As the sound emitter reaches its closes point to the listener, the rate of change of the frequency is at its maximimum. The approach and departure produce a shift which varies at a rate commensurate with the rate of change in the angle between the listener and the moving emitter's trajectory.<BR><BR>Short answer, make your adjustment curves sinusoidal for maximum realism.