A CONCERT producer has warned the Urban Council it would be protecting only its own interests if it was to cancel the second and third concerts of Canto-pop star Alan Tam. ''They have no way out under public pressure but to pass the buck to other parties,'' said executive producer, Peter Chan Wing-kao, from the Engineering Impact company. ''This is most unfair to us and the audience.'' The council is considering cancelling the concerts if the first one exceeds strict noise levels. The company spent an extra $1 million in anti-noise measures, including the purchase of a computerised noise detecting machine from Japan. He urged the council to handle the matter with rationality and sympathy in Saturday's special meeting to decide if the concerts will go ahead. Urban Councillor Fred Li Wah-ming said the council had no choice because they had to ensure that the hirer abided by noise control laws. It had the right to cancel the concert without paying compensation if the organiser could not control the noise. About 70,000 tickets have been sold for the first concert tomorrow.