Of all the weird things to play the music you want, this has to be the strangest. Swann has unveiled a new customizable doorbell that will play any music you want when the button is pressed. The doorbell is called the MP3 DJ doorbell and it sells for $49.99.
You get to music on the doorbell of putting your SD card into a slot. Apparently, you put multiple tracks of polyphonic tones on the card and it will choose between them each time the button is pressed. The button has a 330-foot range from the base and the system is designed for DIY installers.
It also connect the base station to computer via a USB port and uses mass storage device for moving tracks to and from the ST card you put inside. This is a strange device, but I can see it catching on with custom doorbell ring tones.