The samples/sounds used in this piece are as follows (from the bottom manual)
Manual 1 - Hereford Cathedral; (Manual 1 may be coupled to manual 2 - connecting 2 organs together)
Manual 2 plays Yamaha PSR 500 (not used in this recording), PSR8000, Ahlborn Galanti Organ module and also
Manuals 2,3,4 - French Composite Organ by Dennis Featherstone;
Manual 5 plays Robert Morton Theatre Organ;
Manual 6 plays the Yamaha PSR 8000 and GrandOrgue Barton Theatre organ.
The pedal board plays the Yamaha PSR 8000, Ahlborn Galanti, the French composite organ, and the Hereford organ pedals.
Manual 1 and pedalboard also plays an Estey reed organ (not used in this recording).