1.[Board setting]
File ->>> Enviroment ->>> add URL
https://files.seeedstudio.com/arduino/package_seeeduino_boards_index.json
[Tool ->>> Setting]
Board : Seed Studio XIAO
USB stack : Arduino
Debug:off
2.[Library Install]
FastLED 3.3.3 "5kft" fork.
Tools -> Library manager.
https://github.com/5kft/FastLED/tree/platform-xiao
Arduiono MIDI 5.0
Tools -> Library manager.
https://github.com/FortySevenEffects/arduino_midi_library
Arduino USB-MIDI
Tools -> Library manager.
https://github.com/lathoub/Arduino-USBMIDI
MIDIUSB
Tools -> Library manager.
https://github.com/arduino-libraries/MIDIUSB
3.[Over write "buffer memory" & "RunningStatus" setting.]
"midi_Settings.h" over write or USE static const
-> static const unsigned SysExMaxSize = 10240; // more is better.
-> static const bool UseRunningStatus = true;
4.[HARDWARE Wireing to LED (SK9822 or APA102)]
5V with Capacitor 100uF is Better.
SDI(Serial DATA In = MOSI) is Pin:10(XIAO)
CKI(Clock In) is Pin:8(XIAO)
GND