32
are
LO
or
HI
, adjust the
master
volume level of the amplifier accordingly and run the
CAL
sequence
again, until all channels are reported as
OK
and no LEDs blink. Use only the master volume control;
do
not
adjust amplifier channel levels separately, because the Realiser will faithfully replicate any
interchannel level differences.
It is normal for the calibration level to be different for different channels; this is because the angle of
the ear and the pinna shape will shadow different speakers differently. Thus some channels may be
low or high while others are
OK
; and after all channels have been brought into
OK
range, the sweeps
will sound at slightly different levels.
In some cases it will be impossible to see all channels reading
OK
by adjusting master gain. Still, never
adjust individual channel gains. Having all channels
OK
indicates an optimum level, but there is a
wide margin for good measurements. In general one would want to see at least some channels reading
OK
. A channel reading
HI
for which at least two chirps are heard is usable, and some
LO
readings
alongside some
OK
readings should be usable.
If a fault occurs, such as no signal, the affected channel(s) will be turned
OFF
and will need to be
turned back
ON
for another calibration run.
Step 4:
After the level calibration, press the OK button and the display will revert to the Preset 1 ID.
Do not change the master volume level until the speaker measurement below is complete.
Speaker/PRIR measurement
The next process is the measurement through the speakers. Though the sequence is called “speaker,”
the process measures not only the speakers but the listener’s personal head-related transfer function
data, the room acoustics, and the characteristics of the playback electronics. The result is data called
“PRIR” or “personalised room impulse response.”
Step 1:
Press the
SPK
key to initiate the speaker measurement. As with the calibration measurement,
the screen and white LEDs will show which channels are assigned and active. For example, for a
typical 5.1 setup, the screen will show:
1(L )ON 2(R )ON
3(C )ON 4(SW )ON
5(LS )ON 6(RS )ON
7(LB )OFF 8(RB )OFF
The channel assignments and
ON
and
OFF
settings will reflect those seen in the level calibration
process. Again, each channel can be toggled
ON
or
OFF
by pressing the number key corresponding to
the channel number. Unassigned channels cannot be toggled
ON
.
To save the
ON
and
OFF
settings if you have changed them, press
CANCEL
to exit the level calibration
process. Then press the
(!)
key. The screen will say:
>SAVE SYSTEM CONFIG
UPDATE REALISER SW
CONTROL MENU
PASSWORD OPTIONS
Make sure that the cursor is on
SAVE SYSTEM CONFIG
.
Press
OK
and the settings are saved.
