cs-midi-docs/docs/examples/03-interfaces/11-midi-input-callback.md

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# MIDI Input Callback
Receive and handle incoming MIDI messages using the `MIDI_Callbacks` class.
> Original: `MIDI-Input.ino`
```cpp pico
#include "pico/stdlib.h"
#include "pico/cyw43_arch.h"
#include <cs_midi.h>
using namespace cs;
BluetoothMIDI_Interface midi;
struct MyMIDI_Callbacks : MIDI_Callbacks {
void onChannelMessage(MIDI_Interface &, ChannelMessage msg) override {
(void)msg;
}
void onSysExMessage(MIDI_Interface &, SysExMessage msg) override {
(void)msg;
}
void onRealTimeMessage(MIDI_Interface &, RealTimeMessage msg) override {
(void)msg;
}
} callback;
int main() {
stdio_init_all();
if (cyw43_arch_init()) return 1;
midi.begin();
midi.setCallbacks(callback);
while (true) {
midi.update();
sleep_ms(1);
}
}
```