Onset of Putrefaction is the debut album by German technical death metal band Necrophagist. It was recorded almost solely by the band's founder, guitarist and vocalist Muhammed Suiçmez. He recorded all the vocal tracks and programmed the drum tracks with the help of a computer. The bass and guitar tracks were mostly recorded by him, with a few ones being recorded by former Necrophagist members - Jochen Bittmann recorded a few bass tracks, and Bjoern Vollmer recorded a few parts of Extreme Unction's guitar solo.