It's the music, stupid

Over the weekend the Aquaguard service engineer came over to renew the AMC. He inspected the Aquaguard, cluck-clucked a bit on opening the device. And made some comments on the state of the water supply. According to him the Municipal Corporation should clean their pipes more often . ( More often ? Dude, after the Brits built it 200 years ago ,no one has even given it a looksee. And besides what will you clean the water pipes with ? Water ? Aquaguard water ,I suppose . Nice .) Now he continues to fiddle around with the device and pronounces that the musical ring tone chip needs to be replaced as its gone kaput.

We've had the Aquaguard for about 15 years ,I think. Most of our friends ,relatives, office pantries ...all have this contraption. A friend of mine sold these as a part-time job while still in college .And that was 20 years ago. The point I am making is that in all these years I have not come across anyone who has used the music button .

That button ,when pressed gently, belts out a tune. Is it a famous tune ? Beethoven ? If it is , its a pretty watered down version :) . The tune is at best a few notches lower in irritation quotient than the "Attention-Please-This -Car-is-Backing-Out" that was so popular among the Puppies' Marutis not so long ago .

What is the music there for ?
It doesn't turn itself on/off when the water overflows .
It doesn't go off when the AMC is due .
It doesn't chirrup when the water supply is back.
Ok, it lets out a dual-chirrup every time the power goes on and off. So I know when the power is back. Thank You, Aqua.
But still ,why ?

I await the eureka moment.