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Software Laser Synth / Abstract Generator · By BlueFang

Color Modulator - speed?

A topic by johyde created Jul 09, 2017 Views: 218 Replies: 4
Viewing posts 1 to 4

Maxwell is great - thanks! Having a lot of fun with it. One thing - I feel like I'm missing something, but there doesn't seem to be a speed control for colour modulation. Is there a way to vary the speed? If not, might I request this as a future feature?


There are two modes to the color modulator. Solid mode and LFO mode. In solid mode the entire shape is a single color - and the way to modulate the color change rate is with the "hue rot" dial that is under the "saturation" dial.

In LFO mode, the color modulation is performed in HLS color space - and each component (hue, lightness, saturation) has its own modulation controls.  To modulate the speed of the hue you would adjust the "hue mod" dial (the one to the right of "hue width".

In general the "width" dials of each control determines how wide the values are applied around where the color chooser UI node is, and the mod dial controls how fast the modulation occurs. 

Hope that makes sense.

Hi, and thanks for the detailed reply. I'm feeling a bit dozy, as I slightly misunderstood the controls there - I thought the 'mod' controls were essentially the overall amount (which I guess is actually covered by 'width'), but it's pretty obvious that they're speed.

It was specifically the hue I'd got confused on. I wonder if in some future version it might be possible to increase the range on this? ie to modulate the hue faster? I'm also mucking about driving the laser directly with an audio interface, and am getting some quite interesting results modulating the rbg inputs rather quickly. I appreciate this is not quite the same as hue, and also that I don't know for sure that this isn't bad for the laser, but it seems to be dealing with it OK. Just a thought, anyway...


I will add faster modulation to the list of feature requests...

As far as driving the RGB ILDA inputs with audio, that should be fine - but most lasers have an upper limit on the modulation speed of each laser diode - but I don't think there is any harm in driving this signal faster than supported - depending on the design of the driver circuit there is probably a low-pass filter anyway.

Thanks BlueFang - that's what I thought. I think some interesting things can be thrown up by really fast colour modulation.