Arena Coverage

[mike7172]

Okay heres one thats been chewing me,

putting a flown system into an arena.

we have lets say two main hangs, two bleacher hangs, and outfill hangs (side facing)

maybe a few front fills and then obviously subs.

 

this is a hypothetical set-up, but how would we go about delaying this system?

and because the boxes are all facing different directions how do we calculate the delay correctly?

 

any takers?

[TomWeston]

Okay heres one thats been chewing me,

putting a flown system into an arena.

we have lets say two main hangs, two bleacher hangs, and outfill hangs (side facing)

maybe a few front fills and then obviously subs.

 

this is a hypothetical set-up, but how would we go about delaying this system?

and because the boxes are all facing different directions how do we calculate the delay correctly?

 

any takers?

 

could you possibly supply a diagram to explain your set up/ arangement ?

[mike7172]

heres a link;

http://www.google.co.uk/imgres?imgurl=http...280&bih=702

 

looks like the closest array is the outfill, bleacher hang next and then front hang.

does this help?

 

M

[TomWeston]

so is their audience on all four sides? and you going for a center cluster sort of thing?

 

if this is so then I believe that as long as all the arays are the same distance away from a center point (known as the point source) delays will not be needed ?

 

this is from basic knowledge of reading some books so please corect me if im wrong anyone

[mike7172]

you'll have audience infront of the stage (standing),

seated throughout the arena, and to stage left and right.

to make it simple, the bleachers are a 45 degree angle from the main hang, and then the outhangs are 90!

but because the outhang is further back from FOH, my thinking is that both the bleachers and the main hangs must be delayed to them?

[waster]

Yes you need to time align the system. I would use Smaart or SIM to do this with.

 

You should buy Bob Mcarthy's book if you are interested in this kind of thing.

[mike7172]

Yes you need to time align the system. I would use Smaart or SIM to do this with.

 

You should buy Bob Mcarthy's book if you are interested in this kind of thing.

 

do you know the name of this book? cheers!

[Shez]

http://images-eu.amazon.com/images/P/0240521560.01.MZZZZZZZ.jpg

 

Make some strong coffee before you start reading it though!

[Stuart91]

+1 on Bob's book. It is excellent. I am slowly working my way through it.

 

If you want a lighter read, you will pick up lots of useful tips from Dave Rat's Blog although I don't recall him offering any advice on this specific problem.

[BlueShift]

To do this accurately you will need Smaart or some other analysis software.

 

However, the basic principle which can be applied is to take a 2D plan view (top down) view of the L PA, for example. Now draw a line through the axis of each speaker array. Where these lines meet behind the arrays can be considered the 'point source' and then each array can be delayed back to this point.

 

Obviously this is overly simplistic and doesnt take into account multi-path delays and other variables which will affect what you actually do to an arena system in practice, but illustrates the point that in complex systems like this, we are often not aligning all sets of speakers back to a primary set of speakers, but instead delaying all arrays to a hypothetical 'zero point' which the whole system aligns to.