RADIO 3's drive down the middle of the road has won it few plaudits in recent months. Younger listeners, specialist audiences and those with a taste for the more upmarket in voice and music broadcasting have not been catered for. Yet, curiously, the very middle class, middle-aged and middlebrow approach that has turned more eclectic listeners off Radio Television Hong Kong's mainstream light-music and chat station may be just the recipe to revitalise its classical music programmes. The example RTHK has latched on to - Britain's Classic FM - has successfully broadened the audience for the classics in a country where lovers of serious music were too often dismissed as over-educated old fogies. Unlike in Hong Kong, it has not been achieved at the expense of the sober programming style traditional at RTHK. The BBC still caters to the more serious British listener through its own rival station. But the example of Classic FM shows there are more listeners among the radio audience, now stuck with a choice between pop and pomposity, waiting for someone to come along with a more accessible approach to serious music. It is not, of course, true, as Radio 4's Richard Tsang Yip-fat has suggested, that there will be few complaints about the station becoming more populist. There will be some who dislike change and there will be purists who want to keep it highbrow. And itwill not be easy for a bilingual station to match the spontaneity and chatty style of its British model - at least, not while neither the presenters nor the audience is individually bilingual. Nevertheless, RTHK is right to have seized the chance, through the new Radio 4, to bring serious music to a wider audience and put new life into its programming.