A project for all you math whizzes

[Corey]

Here I've attached a project. I would like to set it up so that the drag and drop object controls the volume of the 4 audio channels simultaneously but I don't have the math skills to do it elegantly. Please help if you can.

1. I have four clips loaded into the four channels, and by controlling them in a symbiotic way this project will simulate "3D" sound.

2. Clip 1 is left channel only, reverb only
Clip 2 is right channel only, reverb only
Clip 3 is right channel only, dry signal only
Clip 4 is left channel only, dry signal only

3. The idea here is that as you drag and drop that round blue button, it adjusts the volume of these 4 channels such that you get panning and reverb control.

4. On the Y axis, the sound of the two reverb channels should be at maximum and the sound of the two dry channels should be at zero when the button is dragged to the top of the screen.

5. On the Y axis, the sound of the two reverb channels should be at zero and the sound of the two dry channels should be at maximum when the button is dragged to the bottom of the screen.

6. On the X axis, the sound of the two left channels should be at maximum and the sound of the two right channels should be at zero when the button is dragged to the left side of the screen.

7. On the X axis, the sound of the two left channels should be at zero and the sound of the two right channels should be at maximum when the button is dragged to the right side of the screen.

8. When the button is in the center of the screen, the volume of all 4 channels should be at 64.

9. The sum of all volume values at any given time should equal 256. (255 counting from zero)

10. As the button is dragged from point to point the volumes of the 4 audio channels should adjust relatively. So for example if the button is in the top-leftmost corner, channel 1 would be at 255 with all other 3 channels at 0, etc.

Good luck, thanks for the help! :yes

[Corey]

Bump. :yes

[Worm]

Not sure whether I understood exactly, but here's something to play with.

[Corey]

That's very close to what I meant. In this case it seems to have the reverb reversed on one side, and also when the ball is 100% to the right, you can still hear volume from the left channel. The reverb idea was sort of an analogy for the drag-button being a person, the application window being a room that person is in, with a drummer at the bottom. So the higher you drag the thing, the more reverb there is...

Anyhow very cool, thanks Worm!

[Worm]

Hee!

It was late, what can I say? Change the last bit of code in Global function to this. Plus, I think I understand what you wanted now and made a couple changes to the code. Although my drummer is at the top of the room, you could change that easily enough.



It was a cut and paste moment

	YPercent = Math.Round(nYPos/(425 - 89),2)
	XPercent = Math.Round(nXPos/(630 - 94),2)
	User1 = 255 * (XPercent) * (1 - YPercent)
	User2 = 255 * (1 - XPercent) * (1 - YPercent)
	User3 = 255 * XPercent * YPercent
	User4 = 255 * (1 - XPercent) * (YPercent)
	
	Window.SetText(Application.GetWndHandle(), "User1: "..User1.."  User2: "..User2.."  User3: "..User3.."  User4: "..User4)
	Audio.SetVolume(CHANNEL_USER1, User1)
	Audio.SetVolume(CHANNEL_USER2, User2)
	Audio.SetVolume(CHANNEL_USER3, User3)
	Audio.SetVolume(CHANNEL_USER4, User4)

[Worm]

In my defense, I was playing with this on my Notebook, and it only has one speaker that works

It all sounded much different on my PC.

[Derek]

lol - an excellent defense Brad. Well recovered!

[TJ_Tigger]

Ok we will let you use that excuse just this once. but not again.

Cool stuff guys.

[Worm]

Yeah, Yeah, and my mouth was open too!

[Worm]

Corey,
Did the changes I posted make the volumes work like you wanted?

[Corey]

I'm not sure, I didn't get a chance to edit the original code yet. I'll make sure to do it after work today. :yes

[Corey]

Yep now the reverb is right but the channels are reversed.

Flipped the channels, works great. Thanks Worm!

[Worm]

I guess I need to look at my speaker set up. I swapped the channels because when I moved the ball to the left, my audio was coming out my right speaker.

Anyhow, it was fun to play with.

[Corey]

Yoink!

http://indigorose.com/forums/showthread.php?t=10325

Yeah, very cool Worm. yeah yeaH yeAH yEAH YEAH YA-YA-YA!!!