Calrec SUMMA User Manual page 191

L
Layers
Layers allow the surface faders to change the paths they are controlling. In each layer a different path can be attached to
and controlled by a given fader. There are 6 layers on the Summa.
M
MADI
Multichannel Audio Digital Interface: A coaxial or optical transmission medium providing a 56 or 64 channel capacity.
The MADI standard (AES10) allows simple high density connectivity between different manufacturer's equipment.
MADI is interfaced with an Artemis system via a Hydra 2 MADI I/O unit.
Main
An output bus. A final point at which signals are mixed and affected before they leave the console.
Two versions of each Main are available for patching out of the system - Main and Main (Pre Tone and Talkback).
Main (Pre Tone and Talkback) can be used to avoid the possibility of broadcasting tone and talkback feeds.
Main PC Application
The touch screen based configuration PC application that provides access to GPIO patching.
Memory Isolation
Memory Isolation is a system whereby paths or individual path parameters can be protected from being updated when a
user memory is loaded.
Meter Display
Large TFT display used to display metering information.
Mic Input Headroom
Input headroom is the level in dBs above 0dB available in the system before distortion ('clipping') occurs. The headroom
can be set within Summa's Console Settings. A high headroom offers greater safety at the expense of slightly more noise.
Mix Minus
Mix Minus is a system that allows a comprehensive mix to be sent to multiple listeners each receiving the complete mix,
minus their own input.
O
On Air Mode
On Air mode allows certain operational functions to be activated or inhibited when the system is switched in to it.
P
Patch
A patch is a connection made between a source and a destination in the system. For example an input port may be
patched to one or more channel inputs, or a main output may be patched to one or more output ports.
CALREC
Putting Sound in the Picture
191