There are a variety of options from absorption films that are stretched in front of the window surface (RPG now makes and markets these), to fabric covered vertical blinds which I personally like because then I can close, open, or angle for partial opening.
Acoustics can look like just about anything. Take a look at our examples. WAF does not need to be an issue whether it's traditional or modern design.
As to some of the comments about first reflection points, Floyd Toole of Harmon International recently wrote a very controversal paper on loudspeaker interaction and not treating the room (at least not in the conventional sense). While I don't agree on many of his points, it is written by someone very well versed in the field. He does point out and caution regarding overdamping a room, which is something I subscribe to. All too often too much "stuff" is added tot he room and can actually take away from good sound.
Acoustics can look like just about anything. Take a look at our examples. WAF does not need to be an issue whether it's traditional or modern design.
As to some of the comments about first reflection points, Floyd Toole of Harmon International recently wrote a very controversal paper on loudspeaker interaction and not treating the room (at least not in the conventional sense). While I don't agree on many of his points, it is written by someone very well versed in the field. He does point out and caution regarding overdamping a room, which is something I subscribe to. All too often too much "stuff" is added tot he room and can actually take away from good sound.