Tuning - Alpine PXE-C80-88 Owner's Manual

Tuning

With measurement complete, you are ready to tune
the sound in the vehicle.
Tuning screen
This section is an introduction to the tuning screen.
It will cover the controls shown on the screen
without discussing procedure.
Figure 6 - The tuning screen with its default options
shown.
1
Side Panel Controls
These are the controls available outside of the main
graph area:
EQ Gain Offset - This setting adjusts the boost and
cut of the EQ. This will be the first step in your tuning
process.
Reset to Default - This button resets everything on
this tuning screen to defaults.
Bypass EQ - This toggle allows you to A/B test the
sound with the EQ on and off.
Level - This slider controls the volume of the music
source.
2
Graph Curves
These are the curves shown in the main graph area.
The display of each one can be toggled on and off.
Target (yellow) - This is the curve which you will
manipulate to tune the system. AutoEQ will match
your system's sound to this curve.
Measurement (dark teal) - This is the measured
APVD of your car's system.
EQ (blue) - This is the correction curve AutoEQ will
apply in order to achieve your target curve.
Predicted (gray) - This curve shows what the
predicted result from your target curve will be.
It will vary slightly from the target (yellow) curve, or
may be hidden behind it if AutoEQ is going to hit
your target exactly.
Distortion & Noise (magenta) - This curve shows
the distortion and noise that were present during
your measurement.
Tuning Process
This section covers the standard procedure using
the tuning screen to create your EQ.
1
Check the Distortion & Noise Level
Before proceeding, we must check the Distortion &
Noise curve relative to the Measurement curve. To
make this easier, you may turn off display of all other
curves.
Where the Distortion & Noise curve comes too close
to the Measurement curve, that means there is too
much noise to rely on this measurement in that
frequency range. The Distortion & Noise curve
should be at least 10 dB below the Measurement
curve. If it is 6 dB or closer, that frequency range of
the measurement is unreliable.
Figure 7 - The tuning screen showing an
unacceptable high amount of noise.
It is expected that the Distortion & Noise curve will
approach the Measurement curve in the very low
frequency ranges. This will be in the frequency
range where ambient noise overpowers the system's
capabilities. This is not a problem.
Figure 8 - The tuning screen showing a good noise
level, well below the measurement curve.
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