Rapid Python Tristimulus Centroid Audio Analysis

I have a folder of 12 short-duration sound samples and I need two metrics extracted from every file: the three tristimulus values and the spectral centroid. All data must be processed in Python, ideally... (Budget: $30 - $250 USD, Jobs: Audio Processing, Data Analysis, Data Processing, Data Visualization, Mathematics, NumPy, Pandas, Python, SciPy, Software Architecture)