Missing library

Development Tools IDE 1.x
1

Hello,

I've installed the MIDI library in my arduino system, that means:

Loading the zip file from github

Installing with Sketch/Include library/add zip library

Noticing the message library installed

Despite this, the library is not found by this sketch, an idea?

Regards,

Pfeuh

#include <MIDI.h>                                           

void sendNoteOn(byte channel, byte pitch, byte velocity)
{
    channel = velocity;
    pitch = channel;
    velocity = pitch;
}
    
void sendNoteOff(byte channel, byte pitch, byte velocity)
{
    // trick to shut up the compiler
    channel = velocity;
    pitch = channel;
    velocity = pitch;
}

void setup()
{
    // trick to shut up the compiler
    MIDI.begin(MIDI_CHANNEL_OMNI);
    MIDI.setHandleNoteOn(sendNoteOn);
    MIDI.setHandleNoteOff(sendNoteOff);
}

void loop()
{
    MIDI.read();
}