The other night, Steve and I were watching Bill Bailey's Tinselworm. It's entertaining in many ways - interesting as well as funny - and we've both watched it several times before.
For some reason, this time, we got to the section on doorbells...
... and looked at each other.
To the internet!
Step one: a doorbell which can be personalised. Soon Steve had found one that would play mp3s from an SD card.
Step two: creating an mp3 of the notes we wanted. The notes in question are at about 1:50 on that YouTube clip. But trying to get those few seconds from the DVD, without the crowd sounds, would have been tricky. Since we only needed three notes - and since Steve has enough of a musical ear to be able to identify what those notes are - the free trial version of Pianoteq was our friend here.
Step three was a poor design issue. The "button" part of the doorbell is white, and the bit you press, is also white. It needed to be more visible. Clearly a job for Sugru.
Twenty-four hours for the Sugru to set, and then who knows how long desperately waiting for somebody, anybody, to press the doorbell...