Chorus |
The Chorus effect simulates the sound of several of the same instrument playing the same notes. Adding a Chorus effect works by adding very short delays and modulating the delay times.
Chorusing is very effective on stringed instruments and can be used as a special effect on vocals and other instruments.
Open the Sonic Foundry Chorus dialog.
Choose a preset from the Name drop-down list, or adjust the controls as desired:
a. Drag the Input gain fader to set the gain that is applied to the signal before processing.
b. Drag the Dry out fader to set the level of the unprocessed signal that will be mixed into the output.
c. Drag the Chorus out fader to set the level of the processed signal that will be mixed into the output.
d. Drag the Chorus out delay slider to select the delay time that will be the middle point for the modulation.
Chorusing
effects are typically created with delay times between 25 and 50
milliseconds, depending on the source material. Shorter delay times
will create a flanging effect, and longer delay times will create a
doubling or slap-back delay effect.
e. Drag the Modulation rate slider to determine how fast the delay time is modulated. Choose values of 0.3 to 1 Hz for subtle modulation. Higher values will produce more intense effects.
Modulation
will not be heard until you increase the Modulation
depth setting.
f. Drag the Modulation depth slider to determine how far outside of the initial setting the delay time is modulated. Higher settings will create detuning effects. Lower settings are better for creating lush guitar and string effects.
Drag the Chorus size slider to specify how many times the selection is processed with the chorus algorithm.
A larger Chorus size setting will add depth to the effect and will emphasize the effects of the Feedback setting.
Drag the Feedback slider to specify the percentage of the processed signal that you want to re-process.
Increasing feedback is another way to thicken up the chorus effect. By increasing the Feedback setting, additional delays are added to the signal. The result can range from subtly increasing the girth of the chorus to adding dramatic discrete echoes.
Select the Invert the chorus phase check box if you want to invert the phase of the processed signal before mixing it with the unprocessed signal.
Select the Invert the feedback phase check box if you want to invert the phase of the feedback signal before adding it to the chorused signal.
Inverting
sound data reverses the polarty of a waveform around its baseline.
Inverting a waveform does not change the sound of a file; however,
when you mix different sound files, phase cancellation can occur,
producing a "hollow" sound. Inverting one of the files can
prevent phase cancellation.
In the following example, the red line represents the baseline, and the lower waveform is the inverted image of the upper waveform:
Select the Attenuate high frequencies above check box and drag the slider to apply a low-pass filter to your selection. Frequencies above the frequency specified by the slider will be filtered.
A
wide variety of non-chorus-like effects can be created with this
function: if the Modulation
depth is high, a vibrato effect will occur; if the Chorus
out delay is small, flanging occurs.