The Whip-Poor-Will’s shrill, death-proclaiming song populates the works of Stephen King and H.P. Lovecraft. But the bird itself has fallen on hard times. Could it become a ghost of Halloweens past?

Using MIDI over USB, it plays the I-V-vi-IV progression in any key. It plays in chord mode, arpeggiated mode, or mixed mode at any sensible tempo. You can check out a video of the 4chord playing ...