63
PRIR MEASUREMENT MODES AND MULTIPLYING SPEAKERS
Virtual speakers will localise not only at the azimuth of the real speakers, but also at the elevation of
the real speakers. If, for example, the real surround speakers are elevated, the virtual surround
speakers will also sound elevated. If the centre speaker is above or below a screen, the sound from the
centre virtual speaker will also come from above and below.
For new users, we recommend that the system be emulated as is so that the listener can verify that both
azimuth and elevation have been captured. But changes can be made: for example, the centre speaker
can be placed in front of the screen, rather than above or below, for the measurement. Then the sound
of the virtual centre speaker will come directly from the screen. In this case, the user may wish to add
delay to the centre channel as described elsewhere in the manual.
In the basic procedure described earlier in the manual, the Realiser measures a real system and
emulates however many speakers are actually present. But the Realiser also allows the user to create
multichannel systems using only one speaker, or a pair of speakers. This may be especially interesting
in the case of large, expensive, and/or rare stereo speakers which are almost never seen in all locations
of a multichannel setup.
The controls for these procedures are found by pressing
MENU - SPK
. The screen says:
>SAVE AT END:YES
LOOK ANGLES:AZI
EXCITATION MENU
SPEAKER MODE MENU
Setting
SAVE AT END
to
YES
means that at the end of the test sequence, the measured data is
saved as a PRIR. Set this according to the instructions below for each procedure.
To choose the PRIR measurement mode, first choose
SPEAKER MODE MENU
and the screen will say:
>SPEAKER MODE:ALL
LF ROLL-OFF:NONE
PRIR INFO:ON
Then choose
SPEAKER MODE
. The options are:
ALL
-- This includes the basic measurement sequence described in detail earlier in this manual,
and also allows for staged measurements to multiply speakers.
If, for the
CAL
and
SPK
procedures, you turn
L
and
R
and any number of other channels
ON
,
turn
C
OFF
, and if
L
,
R
and
C
are assigned to channels 1, 2 and 3 respectively, the Realiser will
create a centre channel virtual speaker along with the other virtual speakers. This is so that
multichannel systems without a centre speaker, or with a centre speaker deemed inferior in type
or placement to the main speakers, can be given a virtual centre which is the equivalent of the
left and right. If the real left and right speakers are centred on a screen, the sound from the
virtual centre speaker will appear to come from the screen. When the channels on/off screen
appears at the end of the
SPK
measurement process,
C
will be set
ON
to save the created centre
channel.
If only
L
and
R
are switched
ON
, the Realiser does not create the virtual centre because it is
assumed that the user is making a stereo measurement and would have no use for a centre
virtual speaker.
