ISP Immersive Sound Processor
27
Select Arrangement (E).
11. Measure Acoustic Response of Sweet
Spot
Place the microphone in the exact sweet spot
of the room at ear level to begin. It must be
in the left-to-right center of the room since
it will be used for loudspeaker distance and
level calculations.
Select the arrangement you wish to define
between tightly focused imaging (A), Focused
imaging (B) and Wide Imaging (C) as illustrated
below.
Start the measurement by pressing Proceed
to Measure button (D). Keep the room
silent during the process, the measurement
waveform graphic is updated in real time.
12. Measure Acoustic Response of
Remaining Positions
Once the first measurement is taken,
that position will be checked indicating
successful capture. Move the microphone
to the next position of the diagram that you
wish to measure. Repeat measurements
for all listening positions (A). With each
measurement, the waveform graphic will
update.
Click Proceed to filter design (B) when done
with all 9 or 16 additional measurements.
13. Filter Design
Dirac Live 2.5.2 (and onward) offers the
standard Dirac Live 2.0 approach and adds
the Bass Control module with two modes.
• Off: This mode provides the regular Dirac Live
design with per speaker target curve and standard
Dirac Live filters calculation, so without bass
management.
• Upmix Only: This mode provides regular bass
management filters with standard Dirac Live
filters design and calculation including each sub-
woofer gain being scaled by 1/(numbers of sub
woofers) to match the target curve.
• Full Bass Optimisation: Selecting this mode,
the filter design will harmonise the sub-woofers
and non-sub-woofers speakers in the lower
frequencies using tailor made phase filters, delay
and gains.
In the next parts, we will focus on the Full
Bass Optimisation mode.
A
D
B
C
A
B
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