In either way, the true pipe organ is heard and control is no more complex than a simple cassette tape recorder. There is even a remote control for discreet operation from the priest's chair. Each Key Playing System is supplied including initial survey, delivery and final fitting plus a selection of music including hymns, voluntaries before the service, contemplation pieces and closing voluntaries. Other general music or hymns can be recorded giving the church access to the specific music it uses regularly in worship.