Explore an innovative application of the Web Audio API in deciphering brainwaves during this JSConf Budapest 2019 talk. Discover how JavaScript and browser technologies were utilized to convert brainwaves into audio signals and back again, revolutionizing epilepsy diagnosis on the web. Learn about real-time brainwave filtering challenges and their solutions, while gaining insights into the unexpected applications of everyday web technologies. Delve into topics such as highpass filters, DSPKit, AudioContext, and custom filters for EEG data processing. Witness the intersection of particle physics, web development, and medical innovation as the speaker shares their journey from hadron colliders to decoding brainwaves in the browser.