That music (melody) outside Sogo dept. stores

Does anyone know what the title is of the melody played every half hour outside Sogo department stores?

I live nearby a Sogo… and besides, on some Hsinchu (Xinzhu) buses the song is played shortly when pressing the ‘get off’ button. It sounds incredibly funny. I’m obsessed with the song now and I want to find the electronic-music-doorbell-thing that is used on those buses.

If anyone could help me out where to find the song title and the electronic-music-doorbell-thing… thanks… thanks so much…