10.8.4 coreaudiod Disable/Enabled flooding the system log


After updating to 10.8.4 my sys log is flooded with this:
Code:
6/13/13 3:29:37.518 AM coreaudiod[132]: Enabled automatic stack shots because audio IO is inactive6/13/13 3:29:55.283 AM coreaudiod[132]: Disabled automatic stack shots because audio IO is active
6/13/13 3:30:06.717 AM coreaudiod[132]: Enabled automatic stack shots because audio IO is inactive
6/13/13 3:30:25.938 AM coreaudiod[132]: Disabled automatic stack shots because audio IO is active
6/13/13 3:30:37.266 AM coreaudiod[132]: Enabled automatic stack shots because audio IO is inactive
6/13/13 3:31:08.991 AM coreaudiod[132]: Disabled automatic stack shots because audio IO is active
6/13/13 3:31:20.436 AM coreaudiod[132]: Enabled automatic stack shots because audio IO is inactive
6/13/13 3:31:25.997 AM coreaudiod[132]: Disabled automatic stack shots because audio IO is active
6/13/13 3:31:39.768 AM coreaudiod[132]: Enabled automatic stack shots because audio IO is inactive
6/13/13 3:32:22.747 AM coreaudiod[132]: Disabled automatic stack shots because audio IO is active
6/13/13 3:32:38.086 AM coreaudiod[132]: Enabled automatic stack shots because audio IO is inactive
That's just what happened in less than 3 minutes, so imagine how it looks after 1hr of usage.

Can someone tell me what is the function of this coreaudiod or what is happening????

Btw, this happens on my MBP, so seems to be a 10.8.4 thing.