There are at least four different artists producing under the name "Byproduct": 1. Electronic / computer game music (Juhana Honkanen):
He started producing under the name Byproduct in 2003, has published three albums (Illusory Landscapes 2005, Organisms 2009, New Past 2011), composed for various projects, and played live gigs since 2005.
http://byproduct.koshiyoka.com 2. Progressive Death/Thrash Metal band (Aaron Abrams / Jos Milles / Jason Abrams / Dave Lange):


Read more about Byproduct on Last.fm.