Adobe 22011292 User Guide - Page 196

182 CHAPTER 8 Effects Menu - Edit View Doppler Shifter dialog The frequency of the noise from the car starts out at a high pitch and tempo, and lowers as it races past you. When the car is coming towards you, the noise it's making sounds like it's a higher frequency because each wave crest as it comes towards you is actually compressed by the car itself moving forward. The first crest leaves the car, and by the time the next one leaves, the car itself has moved forward, reducing the wavelength of the sound and raising its frequency. The opposite happens as it passes by you, and the waves are stretched out, resulting in a lower-pitched sound. Path Type Select one of the following: • Select the Straight Line option to have effect's path visualized as a straight line on the graph in the right section of the Doppler Shifter window. • Select the Circular option to visualize the effect's path as a circle on the graph in the right section of the Doppler Shifter window. Depending on the path type you chose, you'll get a different set of options. Note: Unlike many of the graphs in Adobe Audition's effects, the Doppler Shifter graph is non-interactive; you can't directly manipulate the items on the graph using your mouse. Instead, the graph simply displays what the Doppler effect will "look like" as you make adjustments to the effect's parameters. Straight Line Options Set the following: • Starting Distance Away: This value, measured in meters, is the virtual starting point of the effect.