Hi and thanks for dropping by.... These circuits all appeared in Electronics and Music Maker, and Electronics - the Maplin Magazine. Synchime is a module to create bell/gong like sounds, Syntom is designed to create pitched sounds (like toms etc.), Synwave creates noise-based sounds (cymbals, sea-waves etc.). They're all cheap to build, with the components being readily available. Any questions/coments, e-mail me! john.. jat5@unix.york.ac.uk