So isn’t it time our wall art caught up to the modern world? The startup Soundwall is a strange new company whose titular object sits squarely (and often rectangularly) at the intersection of art, music and technology. A Soundwall is a painting that is also a wireless speaker, a hangable piece of artwork that can connect to your smartphone or tablet and play music through its canvas. This is the picture of Macy Gray. Here’s how it works: Like hundreds of other art dealers, the Soundwall website sells canvases, with modern paintings from professional artists, that you can hang on the walls in your home. You can also choose to upload your own image, and Soundwall will print it for you on one of its canvases.