I need to smoothly and slowly fade a dmx channel from TouchDesigner. However at a certain slow tempo the output becomes choppy, incremental and the light moves in steps. I checked to make sure it was the output coming from TouchDesigner and it is.
Is there a general minimum a value can be to be send out? And is there a way to change it?
Any help would be great!
Hi @Finn_b,
DMX has 256 values per channel, 0 - 255. From your description it’s not clear what you refer to with “small values”.
It would be interesting to understand what you are controlling.
Often DMX controlled lights have 16 bit control over movement. So your movement is controlled via 2 DMX Channels.
But totally depends on your specific fixture and how you control it.
cheers
Markus
Hi Markus,
I mean the increments, for example a 0.001 difference…
I’m controlling a Elation Dartz 360 moving head.
With different software (qlab for example) it does work smoothly
Cheers,
Finn
Hi @Finn_b,
There is no 0.001 step in DMX channels - the values have a range of 0-255 with integer increments.
If you use a 16 bit control over 2 channels, the combined value goes from 0-65535 which you might see normalized in user interfaces and a step size of 1/65536 becomes possible.
Here is a example network which converts a single normalized channel to 2 8bit channels assuming it represents a 16 bit value.
base_16bit_to2_8bit.tox (782 Bytes)
so how do you control it? What’s your TouchDesigner network atm. Best to share an example for people to see where the issue is.
Are you sending a 16bit value across 2 channels?
Are you aware of how the coarse and fine control of a fixture work?
Hope this helps a bit
Markus
