The Doppler effect is something that happens to sound when the listener and the sound source are getting closer together or farther apart. For example, a car sound when one is in the car might have a particular frequency, but the frequency will be lower if the car is moving away, and will be like a record played at a lower speed. If the car passes right by it will be high as it gets closer and then low as it gets farther. Doppler dome lets a user adjust the amount of the pitch effect as well as pan and volume based on distance.

Download here: http://aegeanmusic.com/doppler-dome-specs​

 

thanks very cool on risers and upfilters to create some crazy movements