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In 1998 Leonid produced his first psychedelic trance track under guise of Reactive-H3O+. After he began to provide his music into masses. His tracks later were issued by Russian Квадро label. In 2004 he met Andrey from Zirrex project and gave him his track called "Амфетамин". Andrey made remix "Solar Plexus Remix" and Reactive-H3O+ changed its name to Hypnotic Noise project. Now he produces and plays live under this guise.