Midi IN activity led

[Sylvain Fortin]

I search how to make a MIDI IN activity led.
Where to start?
What is component?
I need LUA?
I started like that but how to complete?
Thanks

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[goodweather]

Hi/Bonjour,
you will need Lua for sure but what do you want to achieve?
A LED lighting ON when a Midi msg is received? When should it turn OFF (midi messages are going very fast)?
Should it react on all messages or only on some?
…

The general principle should be:

• create a uiImageSlider modulator with a png image containing the LED ON and the LED OFF (vertical stacked
• create a method MidiMessageReceived that you attach to the panel property “Called when the panel receives a Midi message”
• In that method, you can build an if…elseif..elseif…end structure to sort the messages received based on their length or some byte
• within each elseif you can decide to set your LED uiImageSlider value to 1 and you could launch a timer to leave it on for x ms
• In the timer method, you stop the timer and set the LED value to 0 which will change the picture of the LED so it shows OFF

For the LED, look at my Step by step guide…

Good luck…Dominique

[Sylvain Fortin]

Hi goodweather
First, thanks a lot for your great help !

I want to achieve 16 independent leds. One for each channel.
The led of first channel will goes on when MIDI msg are receive on channel 1 and goes off with no activity. CC With NOTES and others are rejected.
The result is like pulsing led. “000101011110101000000010100101”

And i have to read the huge work of Step by step guide…
Some interesting hours in front of me.
😉

[goodweather]

Then you can proceed as I explained above…

• 16 uiImageSliders components (1 by LED)
• 1 LED image with 2 frames (On/Off)
• MidiMessageReceived method reacting on the messages you want (if…elseif…) and within each “if” a call to another function that you give the LED number in argument. This function would change the value of the LED whatever On or Off. The advantage of a separate function is that you need to code the if channel==1 then elseif channel==2 then… only once 🙂

FYI,I’m busy to write Step by Stepo guide 2.0 and it will be probably 3x bigger because full of Lua explanations…

[Sylvain Fortin]

Hi goodweather,
With your help and your great information i go to read and test with error.
In this method i will learn more.

Thanks a lot
Hi-tech

[Author]

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