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BASIC PROCEDURES
PERSONALISATION BASICS step by step
This section describes the default, simplest method of making measurements. In some cases, such as
when the left and right speakers are substantially narrower than ±30°, or when precise speaker
locations are unknown (behind a perforated screen), etc., alternate methods are advantageous. These
are described in the Additional Controls and Functions section; see especially Azimuth and Look
Angles.
For each new sound system to be measured, the channels in use and the angular data entered in the
Realiser must represent the actual speakers and their actual locations. (See I/O Assignment and Angle
Entry).
The listener being measured should sit in the “sweet spot” of the room. For multichannel this is
generally in the centre of the circle of speakers. For stereo, it is generally at a point forming an
equilateral triangle with the speakers, in which case the speakers are at ±30° azimuth.
Measurements are made using tiny microphones (supplied) which fit in the entrance of listener’s ear
canals. If necessary, the foam can be compressed with the fingers to make this easier; it will expand
after insertion. The foam plugs should be inserted straight into the ear with the cable on the outside
hanging down, and far enough in so that the outer part of the plug is flush with the skin adjacent to the
ear canal opening.
The microphone itself is the tiny round opening at the end of the black plastic housing, above the wire.
This mic opening must be facing out of the ear canal and not obstructed. New users should have a
helper or mirrors to verify that the earplug has been inserted straight, with the mic opening centred and
visible.
Proper mic position relative to the pinna (outer ear) is essential for gathering accurate data. If an
emulation does not sound right, incorrect mic position during measurement is a likely cause.
Right.
Wrong.
Level calibration
The first test sequence is a level calibration. Various sound systems have different gains and volume
settings. This procedure allows the Realiser to cycle through increasing signal levels to find a usable
