The Python script olextract.py extracts the voice onset and offset of by-trial wav files. The script is a direct translation of the MatLab-based EPD script published in Bansal, Griffin, and Spieler (2001) and all credit goes to the authors.
The R-markdown file shows a comparison of the outputs from both the Python and the Matlab version of the script.
Bansal, P., Griffin, Z. M., & Spieler, D. H. (2001).Epd: Matlab Wave FileParsing Software.[On-line]. Retrieved July 15, 2001, from http://oak.psych.gatech.edu/~spieler/software.htm