Songs In The Key Of Life With Nadine O'regan

It's been a tumultuous few months for Niall Walton of Walton's Music.    The managing director of the iconic music shop in Dublin came into the spotlight recently when the news emerged that -- due to rising rents in the city -- Walton's Music would no longer be able to occupy its much-loved spot in Dublin on South Great George's Street. Musicians and music fans posted messages of condolence and sheet music on the shop front, lamenting the changes, which had particular resonance given the long history of the shop: Walton's Music was set up in Dublin by Niall's grandfather back in 1922.    Music has always been a major presence in the Walton family. As Niall told us on the Patrick's weekend programme, music was part and parcel of his early childhood. "We played hide and seek behind the pianos," he recalled. "It's part of your blood."   When Niall took over as managing director, he quickly discovered that -- for all the glitter and glamour attached to the music industry -- owning a music