Fade in and fade out music

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- JLee
- - Joined 25 Feb, 2014
  - 5 topics • 16 posts
- 1
- 3 May, 2014
- Quote
Hello

Does anyone know how to make a fade in and fade out effect using the XAudio2

Thanks
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- Jayjay
- - Joined 18 Mar, 2008
  - 26 topics • 2,290 posts
- 1
- 3 May, 2014
- Quote
Do you mean like positional sounds? (they get louder and quieter as you get closer to them), or pure volume fade?

If so, then the best way is to use a global variable for volume (eg: "MusVol"), maybe a second global variable for whether to fade in/out or not at all (eg: "MusFade", 0 for no fade, -1 for out, 1 for in), then a variable for how much to fade by per second (eg: "FadeSpeed").

Code would look something like this:

IF MusFade = -1 & MusVol > 0 THEN MusVol = MusVol - (FadeSpeed * timedelta)

IF MusFade = 0 THEN MusVol = 100% (I forget exactly if it's in a value between 0-1, or 0-100, or even in dB where 0 is loudest)

IF MusFade = 1 & MusVol < 100% THEN MusVol = MusVol + (FadeSpeed * timedelta)

That's in pseudocode (not real code of any language), so things like "MusFade" would have to be written in Construct's way like: global.value('MusFade')