beep_on_error wraps an expression and plays a short sound only if an
beep_on_error(expr, sound = 1)
An expression to be evaluated for errors.
character string or number specifying what sound to be played by either specifying one of the built in sounds, specifying the path to a wav file or specifying an url. The default is 1. Possible sounds are:
beep is not able to play the sound a warning is issued rather than
an error. This is in order to not risk aborting or stopping the process that
you wanted to get notified about.
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