The so-new-it's-still-under-development webcast Decadio (who doesn't love a clever portmanteau?) is a series of audio channels focused on the music and sounds of each decade from 1910 through today.
Sight8, the company designing Decadio, explains, "Decadio allows listeners to simply select a frequency on a dial and feel transported in time, hearing voices from the past to the present, both familiar and unknown."
You "tune in" using a sliding radio band that's really a timeline (see the image). Listening to "1930s," we heard music from Louis Armstrong and Django Reinhardt, and vintage radio ads for Dodge and Jello Chocolate Pudding. Sliding up (through audible static!) to the 1970s, we heard Nick Drake, Joni Mitchell, and Fleetwood Mac. In between decades, there are small audio nuggest to discover (we heard a radio report about the Beatles at Shea Stadium).