LED Fixtures

[paulears]

Anyone got any comments on the control of these things - I'm thinking of writing the fixture lib to allow the RGB channels to be HTP as well as the intensity channel. Having a poke around as to how the different desk manufacturers do it made things worse. Most have the RGB channels as LTP, in the same way as CMY is normally handled. Avo, offer LTP and HTP versions.

 

My thoughts are that assigning a bunch to 3 faders would let you mix the colour easily, without having the snag of adding an extra one in live dropping the RGB levels on the live ones, as LTP would do? So sticking full red, green and blue on three side by side faders would be the simplest way of doing it. I think?

 

Anybody come accross any snags with doing it this way?

[Light Console]

Nope that is the way I do it. Although I have patched the RGB channels to the first 18 channels (6 units), then the music/stobe controls as the next two channels all together.

I haven't tried LTP, but I think HTP is the simplest way to do it.

[niclights]

My way of thinking on these has been that if a fixture does not have a dimmer master then there is no option but to use HTP. When there is a separate dimmer channel then it's a decision between the additive colour mixing or the ability to use palettes. Of course if the desk supports some sort of 'virtual' dimmer then this is less of an issue.

I do like both options. The ability to run multiple chases and have the colours combine would be impossible with LTP, but equally the ability to do palette recalls (esp. timed) on top of chases in live situations would be invaluable. RGB masters across all fixtures is something I find myself using all the time. The Pulsar ('zone) units give this as an additional function.

On other fixtures with the Pearl if you wanted to have LTP (palette) functionality along with the ability to busk RGB then you could store three playbacks as a memory in mode2.

One crucial limitation with the Pearl is HTP channel limit. This is 240 and the more you patch the slower the desk becomes.

Again with the Pearl I find it makes most sense to patch the RGB channels on to the CMY attributes as HTP. This makes control over multiple fixtures much easier and allows use of shapes.

Regarding the 'Showtec' type units I have used the Chromafix HTP personality for this and then overlayed all the strobe channels onto one handle (one handle = 1 HTP channel in the Pearl)