Not sure what the antique bed covering has to do with the Roman shades.....but.
My thoughts are make the shades and see what that has done for your sound problem. I think anything you do in the nook won't help with bouncing sound in your kitchen proper, and I hate to see you hang an antique piece anywhere near a kitchen...but perhaps if it's not close enough to deaden sound it's not close enough to get that grease that can hang in the air in a kitchen.
I know that "stuff" can help with bouncing sound...like pictures on a wall and stuff on shelves like books.
I would try temporarily hanging something on that wall and see what that does for the sound, and perhaps borrow a couple of rugs from another room and see what that does, drape towels over the backs of a couple of the chairs and see what that does. The idea being to find the kind and amount of "soft stuff" that makes the kitchen sound right to you.
Linda C

Country Living magazine site has gallery's of rooms, living room, kitchen, bedroom, etc. that have quite a few quilts hanging on the walls. I would look through those.
I look at them all the time, they're gorgeous rooms and really inspirational.

Not mine, but I found these on a search

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I've been seeing more and more framed quilts. They look a little more formal. But you can't, or shouldn't, put glass on them if you do because quilts need to breathe.

You can also have a thin panel of accoustic-dampening material mounted under a soft fabric hung on the wall. It can be a formal accoustic panel or something as simple as a couple of layers of old blankets tacked together.

L

I have my the memory quilt my family and friends made and gave us at our wedding over our bed hunk on a wall quilt rack. I have a short, flat wood headboard. The quilt hangs just above the wood edge.

I don't have a picture of the total room which would show the wall covering. My ceilings are 12 to 14 feet high. You've probably seen this picture since I have posted it so much.

.....Jane

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This may give you a better look.

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Lindac, marti8a, liriodendron, arcy, newdawn1895, bumblebeez, It's kind of all of you to offer advice.

I'm really getting the idea from my browsing that the use of a large fabric graphic element requires a plain margin of wall around the decorated piece. A piece suitable for a double bed will be tight in my space. Gotta think about this. Many online graphics of quilts on walls only show a crib-sized quilt or thereabouts in size. newdawn's above is a good visual--shows how much space the quilt really needs. Here's a coverlet museum space--many of the coverlets are only shown as a half with the rest folded behind.

http://www.coverletmuseum.org/nowopen.htm

Bumblebeez, the idea of looking into Country Living was a good one, Have found this, which reinforces the idea of simple surroundings for a quilt...
http://www.countryliving.com/homes/house-tours/colorful-life-0405?click=main_sr

I'm not worried about food or oil wafting toward the nook. None of the bedcoverings is that valuable, just interesting (to me). Here is an early shot of my eating nook. We've commissioned a custom bookshelf to run the entire wall where the temp bookshelf stands--this should also dampen sound when filled with books.

The idea of batting behind a wall hanging is an interesting one. Previously when I made roman shades they were always lined and sometimes filled with Warm Window batting--these probably dampened sound. I was not planning to pad this new set but maybe I should do so after all.

You're right about the amount of space needed, unless you fold the quilt over a hanging rack. If it is a vintage quilt I cared about, like one my grandmother made, I wouldn't put it in a room where there is a lot of sunlight, like the breakfast nook. The sun is really hard on the fabric, and if they are folded, they need to be refolded every month to keep the creases from becoming permanent.

I think most people have wall hangings which are typically square and smaller than a quilt. Even that quilt used as a headboard is too small to be even a twin size. I suspect it was made for that purpose; because of its design, I doubt it was made as a crib quilt or throw.