Ideal design for a new music room


I'm designing a new house which will include a room dedicated to enjoying stereo music reproduction. In my experience, room acoustics have a huge effect on the sound in any particular room.

I'm interested in ideal dimensions, structural materials and finishes. Any experiences and stories anyone?

The music I mostly enjoy is classical, including organ, choral, chamber, solo instruments and orchestral. 
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A room that is not a rectangle or with any parallel surfaces then introduces a whole host of issues in speaker positioning (as each speaker will see a very different set of reflection points). Interesting discussion of this topic in Roy Gregorys experience of his new room 

http://www.theaudiobeat.com/blog/wilson_audio_alexx_thors_hammer_2.htm
Thanks Michael Green for the very interesting and creative work you do. You are the right person to improve the sound in an existing room that doesn't sound quite right. Maybe all rooms need fine tuning and there is no such thing as a perfectly sounding room. But I'd still like to get as close as we can from the start.

Tom6897: A room as round as the inside of a ball is very interesting but may be going too far for what I have in mind. Has anyone heard music reproduced in such a round room?

Folkfreak: Wouldn't a pair of speakers placed in a room something like I describe below have matching reflection points?

  • 18' wall behind the speakers with a pair of side walls at 100º that are 24' long and a slightly curving wall facing the speakers. Height could be 10' at the speakers and 12' at the opposite end. 


I think any way you build it, is probably going to have some issue that you did not consider. 
Beyond making sure it was properly wired, and the walls suitably deadened; I would build it so that it looks good and can be furnished tastefully.
As you are building from scratch, hiring a professional sound tech would make the most sense. IMHO
Bob