Thank you very much Grumpy .... I shall explore that possibility of an off board solution ... Nevertheles, I need only one (1) servo for my application And I am wondering that so simple task as using one servo and producing one sound could be so complex ..... and not existing any trick to solve in an easier way ... On the other hand, I presume that I am not the first Arduiner that experience such difficulty .... Thank you again .. Regards