Sound editing applications like Sound Forge provide many different
processing functions. More often than not, we as musicians don't
usually venture past using these functions for their intended
purposes. But if you are inclined to experiment, you can open up a
whole new world of musical possibilities. One such situation is in
the combination of a number of different functions to achieve a
single effect. An example might be the Doppler effect.
At some time in your life, you've probably noticed that if you are
standing on the side of a road and a car passes by that is either
blasting loud music or blaring its horn, the sound changes in pitch.
This is known as the Doppler effect. For more information, go to:
To achieve the Doppler effect in Sound Forge, you have to process
your audio using three different functions. First, to simulate the
sound passing by you, use the Pan/Expand function as follows:
1) Select your audio data.
2) Choose Process > Pan/Expand.
3) Choose the Left To Right (Linear) preset.
4) Click OK.
Second, to simulate the sound getting closer and then moving away
from you, use the Graphic Fade function as follows:
1) With your audio data already selected, choose Process > Fade > Graphic.
2) Set the Maximum Gain parameter to 100%.
3) Click the Reset Envelope button.
4) Move the beginning and ending envelope nodes to 50%.
5) Add a node to the middle of the envelope and set it to 100%.
6) Click OK.
For the final touch, use the Pitch Bend function to simulate the
Doppler effect as follows:
1) With your audio data already selected, choose Effects > Pitch > Bend.
2) Set the Semitones parameter so that the graph range is set as +1 to 0 to -1. If you want a more dramatic effect, set the range as +2 to 0 to -2.
3) Activate the Preserve Original Duration option.
4) Click the Reset Envelope button.
5) Add a node to the middle of the envelope (at the center vertical line) and set it to +0.5.
6) Add another node to the envelope at one vertical line to the right of the center. Then set this node to -1 (or -2).
7) Set the ending envelope node to -1 (or -2).
8) Click OK.
When you play the audio, it should originate at half of its volume
in the left speaker. Then it will gradually pan to the right speaker
getting louder and slightly higher in pitch as it gets to the center
of the stereo field. As it passes the center, its pitch will drop
and it will move toward the right speaker with its volume getting
This may not seem like a very musical effect, but it might actually
work quite nicely in a pop or rock mix on a distorted guitar part or
a weird background vocal. You have to try things that are out of the
ordinary if you want make interesting music.
Scott R. Garrigus - Author of Cakewalk, Sound Forge, and SONAR Power! books; Publisher of DigiFreq. Win a free copy of PlayPro Interactive Guitar and learn more cool music technology tips and techniques by getting a FREE subscription to DigiFreq... go to: