Programmer Instrument Callback Delay

Hi, I want to use CREATE_PROGRAMMER_SOUND and DESTROY_PROGRAMMER_SOUND to make sure the begin and end time of the Programmer instrument, But the callback have a delay, so i cant exactly ensure its time.
I don’t know, whether I had clearly explain my quesiont, Thanks in advance!

What sort of delay are you seeing and how are you measuring it?
What version of FMOD are you using?