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QSC KLA12 GLL has no HF in EASE 4.4
PostPosted: Mon Jul 08, 2019 8:04 pm Reply with quote
rockyrider
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Joined: 18 Nov 2014
Posts: 5
Location: North Vancouver, BC




I've tried this with three versions of the QSC KLA12 GLL

q_spk_kla_12_ease.gll
QSC_KLA12_R3v11.gll
QSC_KLA12_R1v21.gll

...in an EASE theatre model, and in all cases the 3D direct coverage shows there is no significant HF output above 2000Hz, just as though the HF drivers are muted. And the dropoff in the response curve looks like a crossover slope. There's no setting I can find in the Speaker Properties GLL tab to activate the HF drivers.

When I look at these same GLL files in GLL VIEWER there is output above 2000Hz in the attenuation balloons, all the way up. When I look at these GLLs in FOCUS3, there is output all the way up.

Any idea why EASE 4.4 would be interpreting the GLLs differently than the GLL Viewer and Focus3?
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PostPosted: Thu Jul 11, 2019 9:06 am Reply with quote
AFMG Pedro Lima
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Joined: 05 Jun 2010
Posts: 244
Location: Brazil




Hello rockyrider,

The results between the programs are consistent over here.

Make sure that:
- In Edit Project module > Edit top menu > Room Data option > Settings tab, Pink Noise is marked as Input Signal Type.
- That the scale of your Frequency Response graph in EASE matches the scale used in EASE Focus. By default EASE "zooms in" quite a bit. Mark the "Lock" box and define the limits as the limits used in EASE Focus.
- Or just check the SPL values directly from the table, and by reading them in EASE Focus. They should converge within 1,4 dB or less due to the actually slightly different input signals used.

BR,
Pedro
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PostPosted: Tue Jul 16, 2019 5:03 pm Reply with quote
rockyrider
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Joined: 18 Nov 2014
Posts: 5
Location: North Vancouver, BC




I've confirmed I'm using 1/3 octave for calculation. This is what the output looks like...





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PostPosted: Tue Jul 16, 2019 5:05 pm Reply with quote
AFMG Pedro Lima
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Posts: 244
Location: Brazil




Are you able to send the packed project to support (at) afmg.eu?
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PostPosted: Tue Jul 16, 2019 6:08 pm Reply with quote
rockyrider
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Joined: 18 Nov 2014
Posts: 5
Location: North Vancouver, BC




I can do that.
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PostPosted: Wed Jul 17, 2019 9:27 am Reply with quote
AFMG Pedro Lima
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Joined: 05 Jun 2010
Posts: 244
Location: Brazil




Thanks for the detailed information.

The GLL must be fixed. Apparently the geometric location of the HF driver is incorrect, and is located outside the box.
When you map with shadow there is no line of sight from your driver to the audiences since it is located behind the wall. That is probably also why there is a considerable cancellation in the crossover region at about 2 kHz.

Please contact QSC so they can fix their GLL.

<img>

In the meantime you can continue working (knwoing the limitations) by either moving the loudspeaker slightly forward or by turning off mapping with shadow.

Best Regards,
Pedro Lima

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QSC KLA12 GLL has no HF in EASE 4.4
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