This web site is devoted to an investigation into the sound and tuning of church bells. A specially developed software package (Wavanal) has provided new results and insights both into how bells produce the sound they do, and the factors affecting the quality or timbre of a bell sound. Wavanal runs on a standard multi-media PC and yet allows more detailed analysis than expensive spectrum analysers. The software is free and can be downloaded here . The site includes comparisons between numerous peals of bells, a brief history of bell tuning and a collection of classic papers on the subject