ok im opening pandoras box here.(treatment vs framed wall art)

oleschool:

My listening room - living room has glass windows behind the speakers and along one long wall. So it is a challenge to improve using the old standard acoustic treatment technology. 

I now have a fabulous listening environment using the Synergistic Research room treatment products. They have bullet sized transducers of three varieties that allow you to tune a room. HFT, HFT-2.0, and HRT-X.
These are small and not visually distracting.

I think the Synergistic Research products due the best job of treating rooms. If possible go to the Rocky Mountain Audio Show (Denver) in October to hear and talk to them. They also have good Face Book demonstrations and how to suggestions. 

They are sold with a 30 day return policy so well worth a try.

David Pritchard

Well I do not think all the glass has to go. I am very happy with a Synergistic Research treated room with the latest HFT system (there are three different types of transducers that respond to different frequencies) in concert with the Synergistic Research FEQ ( which improves bass and decreases brightness).

 In addition what wall outlets are you using?  Perhaps a darkish outlet like the Oyaide R-1 is indicated . Another possible help would be SR Black fuses and Black wall outlets. Both products decrease high frequency noise and allow the system to have a more relaxed sound.

Also consider the Synergistic Research Atmosphere device which does allow one to tune the room to some degree. 

The SR Black fuse, Black A/C wall outlet, and Atmosphere unit all come with a 30 day trial.

My listening room is decorated exactly the way I want it. As I type and listen to some fabulous solo female vocal and lute music ( Shirley Rumsey on Naxos), I am enjoying looking at a painting of Saint Celia (patron saint of musicians) which was painted about 1650.

The acoustics are wonderful. The room's visuals are inspirational.

Getting it right took a lot of effort but was worth it.

David Pritchard

oleschool:

geoffkait is absolutely correct that the Marigo dots can be very effective in altering room acoustics. Like the SR HFT's they are small and not visually distracting. Enjoy The Music 2014 (in their tweeks archive) has an article treating a room with small squares of Dynamatt sound damping material (Amazon.com). This is covered in shiny aluminum and so may not work visually, but it does work and the glass in a room can be treated for $30.00.
Acoustic Revive makes a set of Quartz (quarter size) dots that also can be used to treat room acoustics.

Audio Magic makes a set of small bowl acoustic resonators and there is also a set of Zillplex small bowl Resonators for sale at Audio Asylum (seller is TBG on Audiogon).

Have you removed all the pictures and taken a listen? Then replace the pictures one at a time to see if there are a few critical locations that are disturbing the acoustics. You may not need to treat all the glass or some glass may need more treatment than others.

stevizzy:

No not an advertisement for Synergistic Research but rather an enthusiastic endorsement from a very satisfied customer and user.

David Pritchard