Greetings,

Does anyone on the list have prior experience installing ambi-based 3D sound 
into 'dome' shaped replay environments? 

Any tips, specifically on speaker placement, approaches, etc. 

The problems I am facing include a 12 foot 240 degree partial dome made of 
fabric, an 18 foot 240 degree partial dome using fiberglass and a much bigger 
40 foot 360 degree full dome in fiberglass. 

All of the above will actually be 1/2 domes in the sense they are not full 
spheres, but 1/2 a sphere resting on the ground.

My only prior experience was with a full sphere, fibre dome that was a 
nightmare to put sound into…

One option for the 40 foot dome is to use a central cluster of directional 
speakers, hung in a "chandelier" that would use the dome surface as a virtual 
speaker through reflection, but I have never tried this. My concern with this 
is that the listeners (who will be roughly central in all these dome areas) 
will hear both the direct sound and reflected sound and end-up with a confused 
mess. 

For all of these domes there will be an 18" skirt area below the dome that 
could be used for loudspeakers around the periphery - is it better to try to 
beam the sound directly at the listeners position, or perhaps use a more 
diffuse speaker, facing up into the dome face? There will be space to get at 
least one speaker overhead for all configurations.

Regards, Neil

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