How can I syncronize the analog input?

The signal coming from the microphone input of the DSP module, displayed on Waveform Graph, is "slipping".
How can I syncronize the analog input?
Thank you!

Ahh!  You are doing this on the DSP itself.  That would explain the Express VI problem, since you probably do not have floating point available.  A simple level trigger is not hard to code using integer math.  You can use the VIs I mentioned above as a guide (the algorithms should work well with integers as well as floating point) or just do it yourself.  A possible algorithm for a positive going edge trigger is the following:
Search array until first point is less than level and second is greater than or equal to level (use In Range and Coerce to search).
Extract array subset from your data starting at the point you just found.
If you need a particular length of data and are continously acquiring, append data from the next scan onto your data until required length is met.
If you run into issues, let us know.  Remember that shift registers are your friend.
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