There are many controllers out there that will do what you need. There is the Boo Box from Fright Props, the Mini Brock from Gilderfluke, Prop-1 from EFX-TEK, and many others including offerings from Evilusions, Halloween Enterprises, Hauntmaster Products, and more.
Personally I use the Prop-1 with their AP8 audio board and RC4 relays boards. You need to learn a little programming but the product is great and the customer support is superb.
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