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Effects.DirectXEffectParamsSet method (Flanger)

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Sets parameters related to the Flanger effect. The current parameters for the chosen effect can be retrieved using the Effects.DirectXEffectParamsGet method.


DirectX effects requires the availability of DirectX version 8 or higher on the target system and can be applied only if the IsDirectX8Available method returns TRUE.


See the How to apply special effects to a playing sound section for further details.





[Visual Basic]

Public Function DirectXEffectParamsSet (

nPlayerIndex as Int16,

ByRef fx as Microsoft.DirectX.DirectSound.EffectsFlanger

) as enumErrorCodes



public enumErrorCodes DirectXEffectParamsSet (

Int16 nPlayerIndex,

ref Microsoft.DirectX.DirectSound.EffectsFlanger fx




public: enumErrorCodes DirectXEffectParamsSet (

Int16 nPlayerIndex,

Microsoft::DirectX::DirectSound::EffectsFlanger __gc *fx









Number representing the zero-based index of the involved player


Reference to the effect structure containing parameters to apply.






Retrieves and sets the number of milliseconds the input is delayed before it is played back.

Can range from FlangerEffect.DelayMin to FlangerEffect.DelayMax.

The default value is 2ms.


Retrieves and sets the percentage by which the delay time is modulated by the low-frequency oscillator (LFO), in hundredths of a percentage point.

Can range from FlangerEffect.DepthMin to FlangerEffect.DepthMax.

The default value is 100.


Retrieves and sets the percentage of output signal to feed back into the effect's input.

Can range from FlangerEffect.FeedbackMin to FlangerEffect.FeedbackMax.

The default value is -50.


Retrieves and sets the frequency of the LFO.

Can range from FlangerEffect.FrequencyMin to FlangerEffect.FrequencyMax.

The default value is 0.


Retrieves and sets the phase differential between left and right LFOs.

Can be set to on of the following:

- FlangerEffect.PhaseNeg180

- FlangerEffect.PhaseNeg90

- FlangerEffect.PhaseZero

- FlangerEffect.Phase90

- FlangerEffect.Phase180


Retrieves and sets the waveform shape of the LFO.

Can be set to on of the following:

- FlangerEffect.WaveSine (default)

- FlangerEffect.WaveTriangle


Retrieves and sets the ratio of wet (processed) signal to dry (unprocessed) signal.

Can range from FlangerEffect.WetDryMixMin to FlangerEffect.WetDryMixMax.

The default value is 50.



Return value






Negative value

An error occurred (see the LastError property for further error details)

Note that if you should fill the fx structure with values out of range, you could get an exception of type ArgumentException

enumErrorCodes.NOERROR (0)

The method call was successful.