Microsoft DirectX 9.0 SDK Update (October 2004)

EffectsEcho.Feedback Property

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Note: This documentation is preliminary and is subject to change.
How Do I...?

Retrieves and sets the percentage of output fed back into input, in the EffectsEcho structure.

Definition

Visual Basic .NET Public Property Feedback As Single
C# public float Feedback { get; set; }
Managed C++ public: __property float get_Feedback();
public: __property void set_Feedback(float);
JScript .NET public function get Feedback() : float
public function set Feedback(float);

Property Value

System.Single . Percentage of output fed back into input.

This property is read/write. 

Remarks

Can range from EchoEffect.FeedbackMin to EchoEffect.FeedbackMax.

The default value is 50.

How Do I...?

Use Effect Parameters

This C# example demonstrates how to use the parameters of an effect object from a SecondaryBuffer object.

The buffer object in this code snippet is assumed to be the SecondaryBuffer from the code in Add Effects to a SecondaryBuffer Object.

              [C#]
              
//Retrieve the effects object and //the effect param sturctures and edit parameters. EchoEffect echo = (EchoEffect)buffer.GetEffects(0); EffectsEcho echo_params = echo.AllParameters; echo_params.LeftDelay = 250.0f; echo_params.RightDelay = 100.0f; echo_params.Feedback = 85.0f; echo_params.PanDelay = 1; echo_params.WetDryMix = 50.0f; ChorusEffect chorus = (ChorusEffect)buffer.GetEffects(1); EffectsChorus chorus_params = chorus.AllParameters; chorus_params.Delay = 15.0f; chorus_params.Depth = ChorusEffect.DepthMax; chorus_params.Phase = ChorusEffect.PhaseNegative90; chorus_params.Waveform = ChorusEffect.WaveSin; chorus_params.WetDryMix = 50.0f; //Set the new parameters and play the buffer. echo.AllParameters = echo_params; chorus.AllParameters = chorus_params; buffer.Play(0,BufferPlayFlags.Default);


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