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LED RGB Panel cross-universe color issues

Posted: Sun Mar 02, 2025 10:39 pm
by sbenejam
I did some tests with QLC+ 4.14.1-GIT creating an RGB panel with a WS2815 LED strip controlled with an Enttec Octo MK2. I added a 30 x 10 total 300 pixels RGB panel marking the cross-universe option. QLC+ creates 6 rows of LEDs from channel 1 to 540 in the first universe and 4 rows in the second universe starting from channel 29.
The problem I found was that pixels from channel 29 do not have the same color as those from the first universe. If the assigned color for all pixels is for example red the pixels of the first universe (channels 1-512 universe 1 and 1-28 universe 2) are showing the correct color, from channel 29 of the second universe the pixels are green.
I tested in the virtual console to move the slider of channel 29 that is red, when moved a green pixel is turned off, if the slider of channel 30 that must be green is moved, the blue pixel is turned on.
I'll try to make more tests tomorrow to investigate what are happen, The LED strip is working ok when tested with the Octo Standalone mode.

Re: LED RGB Panel cross-universe color issues

Posted: Mon Mar 03, 2025 1:05 am
by SPOPATT
I have a fixture I made that uses two universes. I will test with it and see what happens.

Re: LED RGB Panel cross-universe color issues

Posted: Fri Mar 07, 2025 5:43 pm
by sbenejam
I think I found the issue. QLC+ break to second universe at channel 512. Channels 511 and 512 of the Universe 1 are not controlling nothing. In the simple desk the channel 1 of universe 2 controls the red color of the next pixel of the led strip, the slider of the simple desk is blue instead of red.
On the Enttec website I have found this explanation in the trouble shooting section.

Colour Shift on Universe Change: Ensure that the pixel controller is set to be a 3 channel color (RGB/GRB) for pixels which has 3 channel per pixel, or set to be a 4 channel color (RGBW/GRBW) for pixels which has 4 channel per pixel, this is due to the number of channels the pixel controller will output to prevent pixels controls being split between Universes. 3 channel will output 510 channels per Universe, 4 channel will output 512 channels per Universe. If you are controlling 3 channel pixels, ensure that your console/computer source (Art-Net/sACN) breaks to another universe after 510 channels.
https://support.enttec.com/support/solu ... tallations