I've begun my effort to acousticly treat my mixed use media room. Putting up some panels on the left wall at the 1st and 2nd reflection points will be easy. However, I have a large double hung window that overlaps the reflection points on the right wall.

Since this is not a dedicated theater room, I don't want to fill in the windows with fiber panels. From reading here, it sounds like heavy drapes will do some good, but far from a perfect solution. Are there any affordable acoustic curtians? What have you folks done with windows?

Thanks

Mike,
I have used roller shades made of heavy fabric for taming reflections from glass windows. They look pretty decent also. You can customize them to fit your decor.

http://www.avsforum.com/avs-vb/showthread.php?p=13665896

The heavy velour or velvet curtains hung loosely in folds with an air space behind them would actually be reasonably effective and good value for dollar. You might consider a similar approach on the opposite wall, instead of panels, for acoustic symmetry.