I’m reading user guide for Meyer Sound’s SIM 3 and thought I would share…
On PDF page 57 “Chapter 3: SIM 3 Configurations and Branches”:
QUOTE:
3.1. SETTING UP BRANCHES 3.1.1. Overview
Within SIM 3, the setup and management of the signal paths from console through processor to the loudspeaker and room are organized into Branches. A branch consists of three measurement points:
■ Console: The Console is the audio input into the sound reinforcement system (source), typically the output of a mixing console or other source. This measurement point is exactly the same as the processor input.
■ Processor: The Processor is the audio output from the signal-processing chain that lies between the console output and the amplifier input. Typically this chain includes equalizers and delay lines.
■ Microphone: The Microphone is the output of a measurement microphone located at some position in the venue that captures the audio from the loudspeakers within the room.
Within a typical SIM measurement session, the user will create many branches to have complete information on all the elements of the sound system and the interaction between them at different locations.
3.1.2. Defining Branches
A branch is a series of three connected measurement points that monitor the flow of a signal from origin to its destination. The normal flow is from a console output through a processor to a speaker in the room. The three access points are Console — the point of origin, Processor — the output of the signal processing chain, and the Microphone.
The primary requirement is that all three points are driven by the same original source signal. With this satisfied, the measurement points can be used to make transfer function measurements that will characterize the processor electrical response and the acoustical response of the driven speaker in the room.
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Here is a diagram showing the “three measurement points in SIM 3”
