Linear Acoustic UMPAX v4, User Manual

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Linear Acoustic UPMAX v4 User Guide Troubleshooting
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5.1.3 Unit is Not Upmixing
From the main output screen, make sure that Upmix=On is shown. If not, press the joy-
stick knob to alternate between upmix on/off.
Next, make sure that Center Width is between 0% and 33% and Surround Depth is 100%.
Adjusting these controls can set the surroundfield back to stereo. If Center Width is set to
100% (Center from Lf/Rf) and Surround Depth is set to 0% (Surround from LfRf), the
output signal will be stereo! Normally, these adjustments are Center = 0% and Surround
= 100%.
Lastly, if upmix is on but the unit is still is not upmixing, make sure that the unit is not in
Master Bypass (relay bypass) under the I/O menu.
5.1.4 Cannot Manually Control Upmixing
The unit may be set to respond to GPI or metadata commands. Access the I/O menu and
turn GPI control off.
5.1.5 Analog Outputs Have Noise
Ensure that the system has been set with proper gain structure. This means adjusting the
power amplifiers or powered speakers first, UPMAX v4 channel trims second, and volume
control last. Not following this will cause unnecessary increase of the noise floor and will
impact overall dynamic range. If the Master Volume is set to -40 for normal listening, the
system is not adjusted properly! Consult Chapter 4 for more detailed alignment instruc-
tions.