With the new add_trackDefintion function of reindeer, this is not really needed anymore since the loop over files now occur in that function primarily, and not in the signal processing function.
You can provide start and end times now, but the length of vectors have to be the same of those vectors and the vector with wave file names
In the current implementation of the praat_formant_burg function, beginTime and endTime values are not vectors. They should be.