I've always had this concept of an instrument, but I am wondering if such an instrument is even acoustically possible.
The instrument is a tube, like most other woodwinds, but inside of the tube is a string that is stretched along the length of the tube. Air blown into this tube will somehow make the string vibrate, and the keys on the tube are like fingers on a regular string instrument, they will hold the string down so that only a certain length of the string can vibrate.
Is this possible? How could wind make a string vibrate? Are there any other complications I should be considering?