88
CH1->L CH2->R
CH5->LS CH6->RS
CH3->C CH4->SW
xxx->xxx xxx->xxx
it would indicate that the measuring Realiser had assigned LS and RS to channels 3 and 4, and C and
SW to channels 5 and 6. Such a condition is
irrelevant
to listening. Channel mapping is done by
label, not by number, and only the explicitly indicated mapping matters. The channel assignments in
the measuring Realiser might be of interest only in cases of unusual measured setups where inadequate
notes were taken.
If channels are missing, it means that there is a mismatch between the speaker locations present for the
measuring Realiser and the speaker locations present for the playback Realiser.
Taper
For PRIRs made in reverberant rooms, the user may wish to alter the reverberation decay. Upon
loading a PRIR into a preset, the Realiser allows the user to set the start and end points of a taper for
this purpose.
When a PRIR is to be loaded into a preset, the user presses
MENU
and then the target preset key. As
an example, for preset 2 the user would press
MENU-P2
, and then choose
PRIR PRESET 2
. The
screen will say:
> LOCATION:SD
S:800ms E:850ms
Move the cursor to the second line. The < key will increment the start point of the taper by 50 ms, and
the > key will increment the end point by 50 ms. The default of 800 and 850 represents a 50 ms taper
on the full 850 ms capacity of the Realiser. The start and end points can be adjusted separately to
create tapers longer than 50 ms; the minimum taper is 50 ms. The controls are independent except that
the 50 ms minimum may cause the two values to move together, and the start point limits the end point
options.
When a taper has been set, the preset window will show an indication as follows.
1 john doe
studio a
A 20:01 10-OCT-08
. .TPR. . .
The taper control is somewhat similar to the
WINDOW
control in the virtual speaker setup menu 2. The
differences are: (1) the taper is just that, a linear taper providing a fade to zero, whereas the
WINDOW
control truncates the reverberation tail for an abrupt cutoff; and (2) the taper must be set upon loading
the PRIR into the preset, whereas the
WINDOW
control can be varied easily after the fact. One might
use
WINDOW
to get a quick idea of the reverberation time present in a PRIR, and to judge whether to
reduce it; then use the taper for real listening since a taper will sound much more natural than a
truncation.
In dual-user mode, the time span reproduced by the Realiser is reduced from 850 to 250 ms. Therefore
tapers chosen for the 850 ms single-user mode may be inadequate, and the user may wish to create
shorter tapers especially for dual-user mode.
