midi help

Hey everyone
I have started on a small midi contrller project for my school fair. I got an Arduino and some electronic parts. I found this programming code on the web but it wont verify for me. I dont understand the error messages as I am only starting to learn. Can anyone help me.
This is the code I downloaded.

// This sketch is for building a simple MIDI controller with 2 buttons for
// sending note values & 2 knobs for control values
// To get this working, you should have set up the following hardware:
// - a switch from Digital Pin 2 to +5v, and a 1 to 10K resistor from
// pin 2 to ground
// - a switch from Digital Pin 3 to +5v, and a 1 to 10K resistor from
// pin 3 to ground
// - a potentiometer with one side at +5v, one side at ground, and the
// wiper (center pin) connected to Analog Pin 0
// - a potentiometer with one side at +5v, one side at ground, and the
// wiper (center pin) connected to Analog Pin 1

#include "Midi.h"

// Create an instance of the Midi class.
//
// If we were had to receive messages, you'd have to make a subclass of the
// Midi class. See the MidiReceiveExample for an example of how to do that.
//
// Sending is a lot easier :slight_smile:
Midi midi(Serial);

void setup()
{
// Configure digital pins for input.
pinMode(2, INPUT);
pinMode(3, INPUT);

// This causes the midi object to listen to ALL Midi channels. If a number
// from 1-16 is passed, messages will be filtered so that any messages to
// channels other than the given one will be ignored.
midi.begin(0);
}

int lastDigital2 = LOW;
int lastDigital3 = LOW;

int lastAnalog0 = 0;
int lastAnalog1 = 0;

// MIDI channel to send messages to
int channelOut = 1;

void doControls()
{
int a;

// Changes on analog lines cause control change events
// to be sent; these are parameters from 0-127

a = analogRead(0) / 8 ;
if (a != lastAnalog0) {
midi.sendControlChange(channelOut, 15, a);
lastAnalog0 = a;
}

a = analogRead(1) / 8;
if (a != lastAnalog1) {
midi.sendControlChange(channelOut, 16, a);
lastAnalog1 = a;
}
}

void doKeys()
{
int d;

// Basic code to check pins 2-5; if there's a change on the pin, send
// a NOTE ON or NOTE OFF, depending on whether the button was pressed
// or released, with a different note value for each button. The velocity
// for all of the NOTE ON messages is the max (127)

d = digitalRead(2);
if (d != lastDigital2) {
if (d == HIGH) {
midi.sendNoteOn(channelOut, 40, 127);
} else {
midi.sendNoteOff(channelOut, 40, 0);
}
lastDigital2 = d;
}

d = digitalRead(3);
if (d != lastDigital3) {
if (d == HIGH) {
midi.sendNoteOn(channelOut, 41, 127);
} else {
midi.sendNoteOff(channelOut, 41, 0);
}
lastDigital3 = d;
}
}

void loop()
{
// DON'T need to call midi.poll(), because this sketch doesn't need to
// receive any Midi data.
doKeys();
doControls();
}

What errors are you getting?

Really sorry for not posting errors. Doh

MidiSendExample.cpp:15:18: error: Midi.h: No such file or directory
MidiSendExample.pde:-1: error: 'Midi' does not name a type
MidiSendExample.cpp: In function 'void setup()':
MidiSendExample.pde:-1: error: 'midi' was not declared in this scope
MidiSendExample.cpp: In function 'void doControls()':
MidiSendExample.pde:-1: error: 'midi' was not declared in this scope
MidiSendExample.pde:-1: error: 'midi' was not declared in this scope
MidiSendExample.cpp: In function 'void doKeys()':
MidiSendExample.pde:-1: error: 'midi' was not declared in this scope
MidiSendExample.pde:-1: error: 'midi' was not declared in this scope
MidiSendExample.pde:-1: error: 'midi' was not declared in this scope
MidiSendExample.pde:-1: error: 'midi' was not declared in this scope

MidiSendExample.cpp:15:18: error: Midi.h: No such file or directory

This is telling you that the IDE can't find the Midi library. Have you downloaded it and put it in the correct location?

The remaining errors are all caused by the missing library.