Blackout drapes are good ideas. Used them myself. Work really well.
I also want to suggest, that while imperfect, treating what you can can make up for what you can't. For instance, extra thick rugs, ceiling treatment, and diffusors between the speakers may not fix the glass, but they can make things so much better.
Best,
E
I also want to suggest, that while imperfect, treating what you can can make up for what you can't. For instance, extra thick rugs, ceiling treatment, and diffusors between the speakers may not fix the glass, but they can make things so much better.
Best,
E