Organist Mike Tomesek performs Liturgical and Sacred music on noted organs around the world using Hauptwerk Virtual Organ software. Hauptwerk is a software that allows an organist to play a pipe organ from the comfort of their own space. To put it simply, it is a modern day sampler that uses the technology of high performance computers to operate. Pipe organs from all over the world have been recorded and sampled by various producers and groups and can be purchased/downloaded to run with Hauptwerk.

The software utilizes MIDI (Musical Instrument Digital Interface) as a way to trigger actions on screen. Pedalboards, manuals, pistons, etc that have MIDI capabilities are commonly used to control the pipe organ samples loaded into Hauptwerk. The combination of software, hardware, computer, and sound system creates a virtual pipe organ (VPO).