"Would I give Cara all the dimensions and positions, and then have it tell me what I get? Or, would I give Cara all the dimensions and peices of furniture, etc, and then have it tell me where to put things?"
The former. OTOH, you can restrict the pieces, limiting it to speakers and room dimensions/materials and get an optimum placement. Then you can add each piece of furniture, testing for best positioning.
In the long run, an intermediate strategy is preferred where only the essential furniture is included. Then you can study the 3D graphs to see what places are good/bad for the other stuff.
Easy? No but it works better than actually moving furniture and trying to remember if it sounds better or worse.
The former. OTOH, you can restrict the pieces, limiting it to speakers and room dimensions/materials and get an optimum placement. Then you can add each piece of furniture, testing for best positioning.
In the long run, an intermediate strategy is preferred where only the essential furniture is included. Then you can study the 3D graphs to see what places are good/bad for the other stuff.
Easy? No but it works better than actually moving furniture and trying to remember if it sounds better or worse.