DSFXEcho

The DSFXEcho structure contains parameters for an echo effect.

Syntax

typedef struct _DSFXEcho {
  FLOAT  fWetDryMix;
  FLOAT  fFeedback;
  FLOAT  fLeftDelay;
  FLOAT  fRightDelay;
  LONG   lPanDelay;
} DSFXEcho, *LPDSFXEcho;

typedef const DSFXEcho *LPCDSFXEcho;

Members

fWetDryMix

Ratio of wet (processed) signal to dry (unprocessed) signal. Must be in the range from DSFXECHO_WETDRYMIX_MIN through DSFXECHO_WETDRYMIX_MAX (all wet). The default value is 50.

fFeedback

Percentage of output fed back into input, in the range from DSFXECHO_FEEDBACK_MIN through DSFXECHO_FEEDBACK_MAX. The default value is 50.

fLeftDelay

Delay for left channel, in milliseconds, in the range from DSFXECHO_LEFTDELAY_MIN through DSFXECHO_LEFTDELAY_MAX. The default value is 500 ms.

fRightDelay

Delay for right channel, in milliseconds, in the range from DSFXECHO_RIGHTDELAY_MIN through DSFXECHO_RIGHTDELAY_MAX. The default value is 500 ms.

lPanDelay

Value that specifies whether to swap left and right delays with each successive echo. The default value is zero, meaning no swap. Possible values are defined as DSFXECHO_PANDELAY_MIN (equivalent to FALSE) and DSFXECHO_PANDELAY_MAX (equivalent to TRUE).

Requirements

  Header: Declared in Dsound.h.

See Also

• Echo
• IDirectSoundFXEcho8