Hey guys! Recently, I bought an arduino micro in order to make a led strip that reacts to midi signal. I bought this board because it has native usb support. Now that I have read and work with examples that are included in the MIDIUSB library, I don't know what to do. I tried many times to make a …

Well, that's unfortunate ... Thanks anyway for taking the time to answer me ! :slight_smile:

OK fixed it. The trick was to use the "Arduino/Genuino Micro" board in the Tools menu. That just left your code that would not compile. I got it to compile by changing your loop function to:- void loop() { while (MidiUSB.read().header == 0); // hold until a MIDI message is received if (update) …

Thank you so much! Now the loop and the code compile, but my led strip doesn't lights up... The arduino receives midi signal, but I don't know why the led strip doesn't work. I guess i'll have to code my code in a different way. If you have any idea of how to do it or why my led strip doesn't lig…

but my led strip doesn't lights up. Didn't think they would. :wink: The mistake you are making is that you are assuming that the noteOn, noteOff and controlChange functions are called automatically. They are not. What you have to do is to is to look at the value you get from the MIDIUSB.read ca…

Thank you so much!!! Now my code works perfectly! Appart from that, I have a last question... Is there anything I can do about the lag of my led strip ? (I use WS2812B and they are powered only via my macbook usb port) Is using an external power supply will reduce the lag or is it all because of t…

Using an external power supply will do nothing for the lag, although powering 60 LEDs from the USB is a bit over the top. It depends on how many LEDs are on at the same time. Not sure why you see a lag. What is driving the MIDI? Can you post your final working code.

Here's my final code : Also, I didn't know how to include the controlChange void in the loop... #include "MIDIUSB.h" #include "PitchToNote.h" const byte _NLED = 100; const byte _DPIN = 6; #include <Adafruit_NeoPixel.h> Adafruit_NeoPixel _LED = Adafruit_NeoPixel(_NLED, _DPIN, NEO_GRB + NEO_KHZ800…

Also, I didn't know how to include the controlChange void in the loop. if(rx.header == 0xB) controlChange(rx.byte2, rx.byte3); However I don't quite "get" what your control change function is trying to do. It is expecting a pointer to a byte and a unsigned int. The MIDI message can not give …

Here are some examples of midi messages I'm running trough Ableton live. Those are some typical light effects that I will run through my arduino. I also included a "worst scenario test", which contains a lot of midi notes... Here's my code (I removed the controlChange void, because it wasn't reall…

Thanks. I haven't run it yet but have just worked out why you see a lag. The problem is the WS2812 needs precise timing on the output signal. To achieve this all libraries disable the interrupts when updating the LEDs. If the MIDI is being received over the serial port then some bytes will be misse…

Problem using Arduino Micro and MIDIUSB library

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Tom4D January 18, 2020, 11:20am 23

Did you finished the code, is look cool

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Problem using Arduino Micro and MIDIUSB library

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