Welcome to the 2023 House Symposium of the Brain Institute! This short tutorial is designed to be part of the symposium, offering a comprehensive introduction to the intriguing realm of signal processing and oscillation analyses in neuroscience. Our focus will be on leveraging open-source tools to unravel the mysteries encoded in data recorded at the mesoscopic scale – the Local Field Potential (LFP). The LFP serves as a dynamic window into the activity of a small, localized population of neurons proximate to the recording electrode.