(:source http://arduino.cc/en/pub/code/master/build/shared/examples/04.Communication/MIDI/Midi.ino lang=arduino tabwidth=4:)

(:source http://arduino.cc/en/pub/code/master/build/shared/examples/4.Communication/MIDI/Midi.ino lang=arduino tabwidth=4:)

(:source http://arduino.cc/en/pub/code/new-extension/build/shared/examples/4.Communication/MIDI/Midi.ino lang=arduino tabwidth=4:)

Examples > Communication

MIDI Note Player

This tutorial shows how to play MIDI notes from an Arduino.

MIDI, the Musical Instrument Digital Interface, is a useful protocol for controlling synthesizers, sequencers, and other musical devices. MIDI devices are generally grouped in to two broad classes: controllers (i.e. devices that generate MIDI signals based on human actions) and synthesizers (including samplers, sequencers, and so forth). The latter take MIDI data in and make sound, light, or some other effect.

MIDI is a serial protocol that operates at 31,250 bits per second. The Arduino's built-in serial port (all of them on the Mega as well) can send data at that rate.

MIDI bytes are divided into two types: command bytes and data bytes. Command bytes are always 128 or greater, or 0x80 to 0xFF in hexadecimal. Data bytes are always less than 127, or 0x00 to 0x7F in hex. Commands include things such as note on, note off, pitch bend, and so forth. Data bytes include things like the pitch of the note to play, the velocity, or loudness of the note, and amount of pitch bend, and so forth. For more details, see the MIDI specification, or one of the many MIDI Protocol Guides on the Web.

MIDI data is usually notated in hexadecimal because MIDI banks and instruments are grouped in groups of 16.

For more see this introduction to MIDI or this example.

Hardware Required

• Arduino Board
• (1) MIDI jack
• (1) 220 ohm resistor
• hook-up wire
• MIDI enabled device (optional, for testing)

Circuit

All MIDI connectors are female, by definition of the MIDI spec. Here's how to wire the connector to the Arduino:

• Arduino digital pin 1 connected to MIDI jack pin 5
• MIDI jack pin 2 connected to ground
• MIDI jack pin 4 connected to +5V through 220-ohm resistor

click the image to enlarge

image developed using Fritzing. For more circuit examples, see the Fritzing project page

Schematic

click the image to enlarge

Code

(:div class=code :)

(:source https://raw.github.com/arduino/Arduino/master/build/shared/examples/4.Communication/MIDI/Midi.pde lang=arduino tabwidth=4:)

(:divend:)

See Also:

• serial.begin()
• for() loop

• Serial Call Response - send multiple variables using a call and response (handshaking) method.
• For Loop: - controlling multiple LEDs with a for loop.
• ASCII Table: - generates a table of characters and their ASCII, hexadecimal, octal, and binary equivalents.

SerialEvent

serialEvent()

Description

Called when data is available. Use Serial.read() to capture this data. The serialEvent() can be set with Serial.buffer() to only trigger after a certain number of data elements are read and can be set with Serial.bufferUntil() to only trigger after a specific character is read.

Syntax

(:source lang=arduino tabwidth=4:)

void serialEvent(){ //statements } (:sourceend:)

Arduino Mega only: (:source lang=arduino tabwidth=4:) void serialEvent1(){ //statements }

void serialEvent2(){ //statements }

void serialEvent3(){ //statements } (:sourceend:)

Parameters

statements: any valid statements

(:source https://raw.github.com/arduino/Arduino/master/build/shared/examples/4.Communication/MIDI/Midi.pde lang=arduino tabwidth=4:)

MIDI Note Player

(:source http://arduino.googlecode.com/svn/trunk/build/shared/examples/4.Communication/MIDI/Midi.pde lang=arduino tabwidth=4:)

 (:source http://arduino.googlecode.com/svn/trunk/build/shared/examples/4.Communication/MIDI/Midi.pde lang=arduino tabwidth=4 border=0:)

• for() loop

(:divend:)

See Also:

• serial.begin()
• serial.read()
• switch() case
• if() statement
• digitalWrite()

• Serial Call Response - send multiple variables using a call and response (handshaking) method.
• Serial Call and Response ASCII - send multiple vairables using a call-and-response (handshaking) method, and ASCII-encoding the values before sending.
• If Statement - how to use an if statement to change output conditions based on changing input conditions.
• For Loop: - controlling multiple LEDs with a for loop.
• Array: a variation on the For Loop example that demonstrates how to use an array.
• While Loop: how to use a while loop to calibrate a sensor while a button is being read.
• Switch Case: how to choose between a discrete number of values. Equivalent to multiple If statements. This example shows how to divide a sensor's range into a set of four bands and to take four different actions depending on which band the result is in.

See Also:

• serial.begin()
• for() loop

• Serial Call Response - send multiple variables using a call and response (handshaking) method.
• For Loop: - controlling multiple LEDs with a for loop.
• ASCII Table: - generates a table of characters and their ASCII, hexadecimal, octal, and binary equivalents.

• (1) MIDI jack

• Arduino digital pin 1 connected to MIDI jack pin 5

• MIDI enabled device (optional, for testing)

Hardware Required

• Arduino Board
• MIDI Connector
• (1) 220 ohm resistor
• hook-up wire
• MIDI enabled device "(optional, for testing)"

For more see this introduction to MIDI or this example.

 (:includeurl http://arduino.googlecode.com/svn/trunk/build/shared/examples/4.Communication/MIDI/Midi.pde border=0:)

 (:includeurl http://arduino.googlecode.com/svn/trunk/build/shared/examples/Communication/MIDI/Midi.pde border=0:)

 (:includeurl http://arduino.googlecode.com/svn/trunk/build/shared/examples/Communication/Midi/Midi.pde border=0:)

 (:includeurl http://arduino.googlecode.com/svn/trunk/build/shared/examples/Communication/MIDI/MIDI.pde border=0:)

image developed using Fritzing. For more circuit examples, see the Fritzing project page

(:div class=code :)

 /*
  MIDI note player
  
  This sketch shows how to use the serial transmit pin (pin 1) to send MIDI note data.
  If this circuit is connected to a MIDI synth, it will play 
  the notes F#-0 (0x1E) to F#-5 (0x5A) in sequence.

  
  The circuit:
  * digital in 1 connected to MIDI jack pin 5
  * MIDI jack pin 2 connected to ground
  * MIDI jack pin 4 connected to +5V through 220-ohm resistor
  Attach a MIDI cable to the jack, then to a MIDI synth, and play music.

  created 13 Jun 2006
  modified 2 Jul 2009
  by Tom Igoe 
  
  http://www.arduino.cc/en/Tutorial/MIDI
  
  */

 void setup() {
   //  Set MIDI baud rate:
   Serial.begin(31250);
 }

 void loop() {
   // play notes from F#-0 (0x1E) to F#-5 (0x5A):
   for (intnote = 0x1E; note < 0x5A; note ++) {
     //Note on channel 1 (0x90), some note value (note), middle velocity (0x45):
     noteOn(0x90, note, 0x45);
     delay(100);
     //Note on channel 1 (0x90), some note value (note), silent velocity (0x00):
     noteOn(0x90, note, 0x00);   
     delay(100);
   }
 }

 //  plays a MIDI note.  Doesn't check to see that
 //  cmd is greater than 127, or that data values are  less than 127:
 void noteOn(int cmd, int pitch, int velocity) {
   Serial.print(cmd, BYTE);
   Serial.print(pitch, BYTE);
   Serial.print(velocity, BYTE);
 }

(:divend:)

This tutorial shows how to play MIDI notes from an Arduino.

For more see this introduction to MIDI or this example.

MIDI, the Musical Instrument Digital Interface, is a useful protocol for controlling synthesizers, sequencers, and other musical devices. MIDI devices are generally grouped in to two broad classes: controllers (i.e. devices that generate MIDI signals based on human actions) and synthesizers (including samplers, sequencers, and so forth). The latter take MIDI data in and make sound, light, or some other effect.

MIDI is a serial protocol that operates at 31,250 bits per second. The Arduino's built-in serial port (all of them on the Mega as well) can send data at that rate.

MIDI bytes are divided into two types: command bytes and data bytes. Command bytes are always 128 or greater, or 0x80 to 0xFF in hexadecimal. Data bytes are always less than 127, or 0x00 to 0x7F in hex. Commands include things such as note on, note off, pitch bend, and so forth. Data bytes include things like the pitch of the note to play, the velocity, or loudness of the note, and amount of pitch bend, and so forth. For more details, see the MIDI specification, or one of the many MIDI Protocol Guides on the Web.

MIDI data is usually notated in hexadecimal because MIDI banks and instruments are grouped in groups of 16.

For more see this introduction to MIDI or this example

All MIDI connectors are female, by definition of the MIDI spec. Here's how to wire the connector to the Arduino:

• digital in 1 connected to MIDI jack pin 5
• MIDI jack pin 2 connected to ground
• MIDI jack pin 4 connected to +5V through 220-ohm resistor

Attach a MIDI cable to the jack, then to a MIDI synth, and play music.

This tutorial on MIDI is still in progress. For more see http://itp.nyu.edu/physcomp/Labs/MIDIOutput

 http://www.arduino.cc/en/Tutorial/MIDI

/*

 MIDI note player

 This sketch shows how to use the serial transmit pin (pin 1) to send MIDI note data.
 If this circuit is connected to a MIDI synth, it will play 
 the notes F#-0 (0x1E) to F#-5 (0x5A) in sequence.

 The circuit:
 * digital in 1 connected to MIDI jack pin 5
 * MIDI jack pin 2 connected to ground
 * MIDI jack pin 4 connected to +5V through 220-ohm resistor
 Attach a MIDI cable to the jack, then to a MIDI synth, and play music.

 created 13 Jun 2006
 modified 2 Jul 2009
 by Tom Igoe 

 http://www.arduino.cc/en/Tutorial/PIRSensor

 */

void setup() {

  //  Set MIDI baud rate:
  Serial.begin(31250);

}

void loop() {

  // play notes from F#-0 (0x1E) to F#-5 (0x5A):
  for (intnote = 0x1E; note < 0x5A; note ++) {
    //Note on channel 1 (0x90), some note value (note), middle velocity (0x45):
    noteOn(0x90, note, 0x45);
    delay(100);
    //Note on channel 1 (0x90), some note value (note), silent velocity (0x00):
    noteOn(0x90, note, 0x00);   
    delay(100);
  }

}

// plays a MIDI note. Doesn't check to see that // cmd is greater than 127, or that data values are less than 127: void noteOn(int cmd, int pitch, int velocity) {

  Serial.print(cmd, BYTE);
  Serial.print(pitch, BYTE);
  Serial.print(velocity, BYTE);

}

Examples > Communication

MIDI Note Player

MIDI

Circuit

An LED connected to pin 9. use appropriate resistor as needed. For most common LEDs, you can usually do without the resistor, as the current output of the digital I/O pins is limited.

click the image to enlarge

Schematic

click the image to enlarge

Code

Max code