Dmx pop not smooth output version 2025.32820

Bugs
,
1

dear derivative,

i finaly came around to rebuild my dmx system using the dmx pops. the fixture pop is amazing! really convenient how to control different kind of fixtures in 3d space. but i started to notice that the output was doing some weird things.

  • my file runs at 60 fps but my output only funs 55-56 fps (what I can see with artnetominator)
  • also the output is not really smooth

i checked it with with using dmx out chop to compare the results. i made a file that only puts a sinus on the red channel. and outputs the dmx both via the dmx pop and the chop.
this is the smooth result that comes from the dmx chop:

image
image590×111 10.6 KB

and this is the more jagged result from the dmx pop:

image
image675×113 12.6 KB

here is the file that i used to test this behaviour. i tested this both using artsync on and off and the result is the same.

dmx pop test.toe (4.5 KB)

thanks in advance!

3

Thanks for the example - I’m able to reproduce with that.

As an aside, you can also verify the send rate by using the DMX Out POP/CHOP’s Info DAT, specifically the packet_rate field. There, I can also see that it tops out at a rate of only about 57.

I will look into this further and update you once I have a fix.

4

Can also reproduce this. Maybe interesting to note that it always caps at a slightly lower rate than requested. So when I set the project to 50fps this caps at 47 ish.

5

Output smoothness is improved in the latest official version: 2025.33060. The discrepancy between the packet_rate and the rate specified on the parameter is also fixed.