Calrec SUMMA User Manual page 190

E
Ember
The Ember protocol is a sophisticated data exchange mechanism that has potential for remote control of many functions
across varied equipment types.
F
Fader
Faders are located on surface fader panels. Channels, Mains, Groups, Auxs and Tracks can all be attached to faders
allowing for control over level and access. Faders are also used to control VCA groups.
Foldback
An audio mix sent to a presenter or artist. Applications include enabling them to hear their own input or communications.
G
Gigabit Ethernet
A family of network technologies used for connecting equipment and efficiently passing large amounts information over
copper or fibre links.
GPIO
These connections allow simple on/off signals to be sent and received by the system. Functions of the system can be
controlled from external sources via opto-isolated inputs. The system can control external items of equipment based upon
surface actions via relay outputs. GPI/O connections are optional fittings for Hydra2 I/O boxes
Group
A bus to which many audio signals can be routed, summed and controlled simultaneously with a single fader. Groups
have full EQ and dynamics processing. For example, all audience microphones may be sent to the same group bus for
easy access. Groups must be routed to output buses in order to be patched out of the system.
H
Hydra2
An audio networking system which links I/O boxes to one or many consoles over Gigabit Ethernet. Summa is based
around a Hydra 2 system.
Hydra2 Router Module
All Hydra2 I/O boxes connect to the network via a router. The router module contains 16 SFP sockets that can accept
either copper or a range of fibre connections by using the appropriate adaptor.
I
IFB Interruptable Fold Back
IFB is a foldback mix which can be interrupted by tone or talkback. This function is normally handled by the track buses.
190 SUMMA
Networked Audio Production System
TERMINOLOGY