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Effects.PhaserApply method |
  
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Effects.PhaserApply method |
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Remarks
Applies a phaser effect to the given portion of sound under editing.
Phasers use an internal low frequency oscillator to automatically move notches in the frequency response up and down the frequency spectrum. An important difference between phasing and flanging is that phasers space these notches evenly across the frequency spectrum, while the notches in flanging and chorus are harmonically (musically) related. You don't hear the notches as such (because they are the frequencies that are removed). What you hear is the resulting frequency peaks between these notches. Phasing works by mixing the original signal with one that is phase shifted over the frequency spectrum. For example, a four stage phaser signal (such as this) could be from 0 degrees at 100Hz, shifted to 720 degrees at 5Khz (these extremes are not quite possible practically, but are near enough to explain the effect). This is how the term phase shifter comes about. A 4 stage phaser has 2 notches with bass response, a central peak, and treble response. By using resonance to enhance the central peak, you can get a sound similar to an automatic wah. Using a phaser with lots of stages and setting the resonance high can give a sound similar to flanging, although they are really quite different.
During the execution of the editing session the CallbackEditPerc delegate is invoked in order to notify about the percentage of advancement.
For further details about callback delegates see the How to synchronize the container application with the API tutorial.
For further details about methods related to the use of special effects refer to the EffectsMan class.
Syntax
[Visual Basic] Public Function PhaserApply ( nStartPosition as Int32, nEndPosition as Int32, nAffectedChannel as enumChannelMasks, fDryMix as Single, fWetMix as Single, fFeedback as Single, fRate as Single, fRange as Single, fFrequency as Single ) as enumErrorCodes |
[C#] public enumErrorCodes PhaserApply ( Int32 nStartPosition, Int32 nEndPosition, enumChannelMasks nAffectedChannel, float fDryMix, float fWetMix, float fFeedback, float fRate, float fRange, float fFrequency ); |
[C++] public: enumErrorCodes PhaserApply ( Int32 nStartPosition, Int32 nEndPosition, enumChannelMasks nAffectedChannel, float fDryMix, float fWetMix, float fFeedback, float fRate, float fRange, float fFrequency ); |
Parameter |
Description |
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nStartPosition |
Start position, expressed in milliseconds, of the affected sound range. |
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nEndPosition |
End position, expressed in milliseconds, of the affected sound range.. If set to -1 the end position will be set to the end of the sound. |
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nAffectedChannel |
Numeric value that determines the combination of affected channels. Supported values are the following:
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fDryMix |
Numeric value representing the Dry (unaffected) signal mix. Supported values are in the range from -2 to +2. |
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fWetMix |
Numeric value representing the Wet (affected) signal mix. Supported values are in the range from -2 to +2. |
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fFeedback |
Numeric value representing the output signal to feed back into input. Supported values are in the range from -1 to +1. |
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fRate |
Numeric value representing the rate of sweep expressed in cycles per second. Supported values are in the range from 0 to 10. |
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fRange |
Numeric value representing the sweep range expressed in octaves. Supported values are in the range from 0 to 10. |
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fFrequency |
Numeric value representing the base frequency of sweep range. Supported values are in the range from 0 to 1000. |
The fDryMix is the volume of input signal and the fWetMix is the volume of delayed signal. The fFeedback sets feedback of phaser. The fRate and fRange parameters control how fast and far the frequency notches move. The fRate is the rate of sweep in cycles per second, fRange is the width of sweep in octaves. And the the fFrequency is the base frequency of sweep.
Below some sample:
Effect type |
fDryMix |
fWetMix |
fFeedback |
fRate |
fRange |
fFrequency |
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Phase shift |
0.999 |
0.999 |
0.0 |
1.0 |
4.0 |
100.0 |
Slow invert phase shift with feedback |
0.999 |
-0.999 |
-0.6 |
0.2 |
6.0 |
100.0 |
Basic phase |
0.999 |
0.999 |
0.0 |
1.0 |
4.3 |
50.0 |
Phase w/ FB |
0.999 |
0.999 |
0.6 |
1.0 |
4.0 |
40.0 |
Med. phase |
0.999 |
0.999 |
0.0 |
1.0 |
7.0 |
100.0 |
Fast phase |
0.999 |
0.999 |
0.0 |
1.0 |
7.0 |
400.0 |
Invert w/ invert FB |
0.999 |
-0.999 |
-0.2 |
1.0 |
7.0 |
200.0 |
Tremolo Wah |
0.999 |
0.999 |
0.6 |
1.0 |
4.0 |
60.0 |
Return value
Value |
Meaning |
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Negative value |
An error occurred (see the LastError property for further error details) |
enumErrorCodes.NOERROR (0) |
The method call was successful. |
