We have a couple of Marimekko fabrics that we picked up in Helsinki and wrapped around wood stretcher bars. While we did this simply to create an art piece there is an added acoustical benefit for your home theater or listening room.
Pic courtesy of Design*Sponge
As Laura over at the Dwell blog points out "Sound bounces off hard surfaces, such as wood, metal and tile, creating a din. Upholstery, canvases, pillows and acoustic tiles absorb sound, helping you to better hear its nuances." The picture above shows Herman Miller's graphic print acoustical panels that can help in this area. While we assume there is a lot more to the Herman Miller offering than a piece of fabric wrapped around a wood frame, there's nothing easier or cheaper than making a fabric hanging yourself to get some better acoustics.