... ...A gold plated instrument is first silver plated. With the silver plate base and gold plate finish, most players will notice a darker sound than if an instrument was simply silver plated... ...
自:
http://www.edwardsinstruments.com/trumpet/options/finishes.php
镀金乐器首先要先做镀银处理,大多演奏者会感受到镀金的乐器与只镀银的相比音色较暗。