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I need computer software (if it exists) that will create an alert at precisely 9:30:50, 9:31:50, 9:32:50 etc. I don't need it on the min. It has to be before the min. and every 60 seconds.

They all alert on the min. I need 9:30:50, 9:31:50, 9:32:50, etc.. I guess I need a timer that will alert to the second.

Does anyone know of any software that can create an alert signal that will go off :10 seconds before each minute. Thanks.