The album was recorded by several different production teams simultaneously over a very short period of time.
That allows a customer to watch a program live while simultaneously recording three others.
Anthony went to the printer, where a hard copy was being simultaneously recorded on paper.
Some allow two programmes to be recorded simultaneously while a third is being viewed live or played back.
Originally, a signal would be recorded to two tape machines simultaneously.
Output is heard in real-time and can be simultaneously recorded to a sound file.
At the least, it must be simultaneously recorded in some fashion to be fixed.
Upon examination of these discs, it seems that many programs were broadcast live, and recorded simultaneously for repeat later.
One useful evaluation technique is to record from the two eyes simultaneously and compare the vertical rotation records.
Today, a live broadcast that is being simultaneously recorded, is protected by copyright.