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filters). Use global gain makeup judiciously to
avoid clipping.
20.
Limiter
To prevent distortion due to loudspeaker
overdriving or amplifier clipping, you may wish
to engage a limiter on a channel. When enabled,
a compressor will attenuate audio above the
threshold set by the Limiter Value for that
channel back down to that value. For instance,
if the limiter is enabled and set to -3dBFS, any
audio that exceeds -3dBFS will be reproduced
at -3dBFS. By their nature, limiters are not ideal
acoustic solutions, but this feature can prevent
subjectively worse sounding distortion, or in
extreme cases, damage to loudspeakers or
amplifiers. If you find that you are aggressively
using the limiter function, you are encouraged
to upgrade loudspeakers and/or amplification.
21.
Phase Invert
Check the box for any channel you in which you
wish to invert polarity.
Expert Bass Management
When it is desirable to fine tune subwoofer
integration beyond what is possible in Standard
Bass Management Mode, you may select Expert.
The flexibility within can achieve greater subwoofer
integration, but should only be used by calibrators
with sufficient skill otherwise comparably poor
results may be inevitable. Compared to Standard
mode, Expert includes the following features:
•
Additional Size/Filter options
•
Ability to separate HPF and LPF frequency and slope
per channel
•
Ability to mix SUB bass (not just LFE bass) back into
channels set to Large, Large and Sub and Large with
Sub.
SP4 Immersive Surround Processor
1. Size/Filter
Speakers may be set to one of the following 4
options:
Small: Channel is high pass filtered according to the
•
HPF frequency and slope. Bass is routed to subwoofer
channels according to frequency and slope defined
by LPF frequency and slope. Small speakers cannot
have subwoofer or LFE bass mixed in.
Large: Channel is not band limited. Channel can
•
have subwoofer and/or LFE bass mixed in.
Large and Sub: Channel is not band limited, but a
•
copy of bass for this channel is routed to subwoofer
channels as well. Set the frequency below which bass
should be sent to the subwoofer and the slope at
which the crossover occurs.
Large with Sub: This special case enables you to
•
effectively split a full range loudspeaker into a "small
speaker" plus "virtual subwoofer". The HPF frequency
and slope define the characteristic of the "small
speaker" portion. LPF frequency and slope define the
virtual subwoofer characteristic.
Output Mapping
Should you wish to map a physical analog
output channel to a loudspeaker other than
the default assignment, you may do so from
the Main Speakers page. Click Output Mapping.
Using the New Output column on the right of the
pop-up menu, select a new output channel. If you
choose a currently occupied new output channel,
that channel will be automatically reassigned. Save.
19
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