Butler states the entire recording of "Sally..." was done "on an old Ampex tape machine at 7 IPS mono....Each time when I added another element" – including the final element: the vocalists – "I added a different type of reverb.
Butler describes the process of recording "Sally..." by stating that it was done on an old Ampex tape machine at 7 IPS mono and that each additional element, including the vocalists, received a different type of reverb.