Why does Mach beep,clink or clank whatever you call the alert tone, while in the middle of running a program? It makes the sound on manual tool changes, I understand that to get your attention, but why in the middle of the code when nothing out of the ordinary appears to be going on?

 
Sage

It sings when it get to a message as well (;-) Simply turn it off in config.

(;-) TP

I didn't really want to turn it off. It doesn't bother me and it's useful to have it get my attention as a confirmation that something happened. I was just wondering why it beeps in the middle of code. Just curious more than anything.
 I notice the "abnormal condition" indicator flashing. Not sure when it started. Perhaps on that condition it beeps??
 I've forgotten what "abnormal condition" is anyway.

Dave