Objects used to receive and send notes are and respectively. You can also in pd 'filter' the midi messages by specifying which channel/port we want to 'hear' with an 'argument' in the midi object. Pd can use also multiple midi devices, so in the midi settings window (seen before), you can add more devices by clicking on the button 'use multiple devices' and adding it in any free 'port' (each one with the respective 16 channels.) There are usually 16 midi channels in total. Usually midi devices use one 'channel' for sending and recieving this information. Midi channels are used to identify devices so you can receive and send notes with specific hardware (or software!).

To do this you need to know a little about the concept of midi channels.

Once we have chosen the midi device, we can check if it´s working. This can be found inside the utilities folder as shown below. Note to OSX Users : In some cases with OSX you will need to check and activate the device in this 'Audio midi setup' app. In this case, we have selected our hardware 'USB MIDI 1x1' (a midi interface) and the rest of 'devices' called IAC are internal midi buses in osX. Before starting pd, you should plug your midi hardware, otherwise it will not show up in this dialog. Then select which device you want to use for input/output midi, by default no device is selected. Setupīefore start working with midi, you should select your device in the dialog: Preferences/midi settings This chapter will show you how to use midi to receive notes from midi keyboards or control messages from standard midi devices and also how to send midi to other programs or to midi hardware.

Midi note to pd number chart