The PC speaker is normally meant to reproduce a square wave via only 2 levels of output (the speaker is driven by only two voltage levels, typically 0 V and 5 V).
For example, if your payments for March and July 2010 were each one month late, the report may continue to show (for seven years from the date after each payment was due) that you were 30 days late twice in 2010, even though the tradeline for that account also shows your payments for the rest of 2010 were made on time.
you may have to pay a late fee if you re a couple days late but the late payment won t go on your credit reports and stay there for seven years as a more serious slip up would the three major credit bureaus experian transunion and equifax allow creditors to report payments that are 30 60 or 90 days late