JetCityMusic | 1 decade ago

The Tremvelope by Pigtronix is a high-quality optical tremolo effect with the optional control of an envelope filter! This allows the dynamics of your playing to automatically adjust the speed and depth of the effect. Available at www.JetCityMusic.com.

http://www.jetcitymusic.com/index.php?page=shop.product_details&flypage=vmj_naru.tpl&product_id=462&category_id=46&manufacturer_id=3&option=com_virtuemart&Itemid=89