ABSTRACT
Impedance matching is needed when dealing with audio frequency in cables with lengths of kilometers/miles. The main meter can be fed through the jack field via so-called “half normalization.” By this type of connection, the signal commonly routed to the meter is broken when a jack is inserted. An inexpensive variation could be to connect the meter to a Sony/Philips Digital Interface coax output. It ought to be possible to get a digital meter to read the data transmitted over the interface, even though the voltage is a little lower than Audio Engineering Society/European Broadcast Union. The standard level meters in digital audio workstations are often peak reading or rather sample-based reading. They may, however, read RMS and further have some extra functionality added, such as peak hold, clip/overload indication, and valleys. In some workstations, it is possible to insert the meters pre or post faders.
