Q Light Controller+

Hello,

I would like to use an audio trigger to drive some derby or laser motors on my multi effect bar.

If I use a direct DMX signal or a VC Slider from the audio triggers I have a pretty raw/jerky move.

I have then tried to use the Audio triggers to set a speed dial value. I use that way to set speed of some chasers (with fade In for instance) but then I have not found a way to connect the speed dial to a slider (or kind of).

Any help would be appreciate

edit: maybe a solution would be to have an option on the audio triggers to sent DMX (and/or also when sent to VC Slide) the value every "x" ms so that the fixture would have time to adjust by itself the motor speed and so have something smooth instead of having multiple change all the time.

taz07rx wrote: ↑Thu Nov 21, 2024 6:02 am but then I have not found a way to connect the speed dial to a slider (or kind of).

You will need some Loopback Magic for this to happen... MichelSliepenbeek https://www.qlcplus.org/forum/memberlis ... ile&u=9728 has lots of nice examples. I'd check his posts.

Try this:


Above the Slider you will find the Speed Dial (you should add your Functions to it).
On the Input Tab you will see that it uses Loopback Channel 1 as External Input (feel free to change the Range to match with your functions).

The Slider sets the Loopbback Channel.

The Audio Trigger uses the Slider.


It is important to use a seperate Universe for your Loopback Channels.
If you check the Input/Output Tab you will see that:
- Universe 1 is for Fixtures (and outputs to a USB DMX dongle).
- Universe 3 is for Loopback and outputs to Loopback 1 (which again is input for Universe 1).

Thanks all !

I also found the answer of my other question in the fixtures/channels Fade Configuration and then editor with templates (RTFM )

That would be an other option: use a Channel Modifier https://docs.qlcplus.org/v4/fixture-man ... properties.

Modifiers like Logarithmic or Exponential for instance might give you a smoother response.
And you can even use a channel modifier on a Loopback Channel: you have a lot of options.

yes that's exactly what I have done (fixtures/channels Fade Configuration and then editor with templates I talked is the way to reach the channel modifier option)
It works nicely

thanks

so now I think I have everything I need to rewrite my project

Last question I have is : I use a VC audio trigger to set the duration of a Speed dial. The speed dial then set some Cue list speed. Nothing special here.

My music style has some momentum and then break/drop for voice or just some melody and then go back to momentum with kick. Basically let's say EDM/Techno.

The Audio trigger and all the tuning we can do using frequency or volume is more than enough for my usage but there is a behavior I would like to improve : sometime (or pretty often I would say) bpm is let's say at 138... then suddently come the voice (no more audio hit as my low freq or even volume trigger is below threshold)...in this scenario the speed dial stay at the previous speed and so the light are too fast. I would like a calm down period.
Is there a way to say something like : if the audio trigger has not received new sound that match the trigger settings for n (m)seconds sent a default value (like something slow) to the speed dial ?

You could achieve this with reverse logic.
Create a chaser with two steps. Set step 1 time as long as you think your threshold time should be.
Have the audio widget restart this chaser with every beat.
If the chaser reaches step 2 (so no more beats during set time in step 1), you can, with the help of a loopback channel, to default your speed widget.
The problem is that you need at least x number of beats before the speed dial changes speed again.

Thank you, that's pretty smart !

I was not able to directly use the audio trigger to launch a full cycle of my chaser as the chaser stuck on step1 whatever if I use a VC button or a chaser function as trigger in the audio trigger.

It works that other way but it is not perfect as it use a toggle button:
- Audio trigger -> function loopback generic(1) -> loopback external input of a button (for manual purpose) -> launch my chaser function

- Chaser function (single shot) with 2 step:
Step1: Dummy scene set to x ms
Step2: set timer scene that use a loopback generic(2)

- Speed dial preset that use loopback generic(2) to set my defaut speed

edit: I have attached two basic example to illustrate the case that works for me but not fully perfect and the one using audio trigger to start chaser (and then stuck step1)

I found something that works using solo frame

I would prefer in fact a feature either to allow to start a function/script and let him finish even if the parent stop (of we explicity ask to stop) or an audio function trigger without the stop threshold to let the start trigger my chaser one cycle from start to end except if another trigger ask to start again.