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Diffstat (limited to 'doc/classes/InputEventMIDI.xml')
| -rw-r--r-- | doc/classes/InputEventMIDI.xml | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/doc/classes/InputEventMIDI.xml b/doc/classes/InputEventMIDI.xml index 040eee7b98..1e41d09ac0 100644 --- a/doc/classes/InputEventMIDI.xml +++ b/doc/classes/InputEventMIDI.xml @@ -1,27 +1,96 @@ <?xml version="1.0" encoding="UTF-8" ?> <class name="InputEventMIDI" inherits="InputEvent" version="4.0"> <brief_description> + Input event for MIDI inputs. </brief_description> <description> + InputEventMIDI allows receiving input events from MIDI devices such as a piano. MIDI stands for Musical Instrument Digital Interface. + MIDI signals can be sent over a 5-pin MIDI connector or over USB, if your device supports both be sure to check the settings in the device to see which output it's using. + To receive input events from MIDI devices, you need to call [method OS.open_midi_inputs]. You can check which devices are detected using [method OS.get_connected_midi_inputs]. + [codeblocks] + [gdscript] + func _ready(): + OS.open_midi_inputs() + print(OS.get_connected_midi_inputs()) + + func _input(input_event): + if input_event is InputEventMIDI: + _print_midi_info(input_event) + + func _print_midi_info(midi_event: InputEventMIDI): + print(midi_event) + print("Channel " + str(midi_event.channel)) + print("Message " + str(midi_event.message)) + print("Pitch " + str(midi_event.pitch)) + print("Velocity " + str(midi_event.velocity)) + print("Instrument " + str(midi_event.instrument)) + print("Pressure " + str(midi_event.pressure)) + print("Controller number: " + str(midi_event.controller_number)) + print("Controller value: " + str(midi_event.controller_value)) + [/gdscript] + [csharp] + public override void _Ready() + { + OS.OpenMidiInputs(); + GD.Print(OS.GetConnectedMidiInputs()); + } + + public override void _Input(InputEvent inputEvent) + { + if (inputEvent is InputEventMIDI midiEvent) + { + PrintMIDIInfo(midiEvent); + } + } + + private void PrintMIDIInfo(InputEventMIDI midiEvent) + { + GD.Print(midiEvent); + GD.Print("Channel " + midiEvent.Channel); + GD.Print("Message " + midiEvent.Message); + GD.Print("Pitch " + midiEvent.Pitch); + GD.Print("Velocity " + midiEvent.Velocity); + GD.Print("Instrument " + midiEvent.Instrument); + GD.Print("Pressure " + midiEvent.Pressure); + GD.Print("Controller number: " + midiEvent.ControllerNumber); + GD.Print("Controller value: " + midiEvent.ControllerValue); + } + [/csharp] + [/codeblocks] + Note that Godot does not currently support MIDI output, so there is no way to emit MIDI signals from Godot. Only MIDI input works. </description> <tutorials> + <link title="MIDI Message Status Byte List">https://www.midi.org/specifications-old/item/table-2-expanded-messages-list-status-bytes</link> + <link title="Wikipedia General MIDI Instrument List">https://en.wikipedia.org/wiki/General_MIDI#Program_change_events</link> + <link title="Wikipedia Piano Key Frequencies List">https://en.wikipedia.org/wiki/Piano_key_frequencies#List</link> </tutorials> <members> <member name="channel" type="int" setter="set_channel" getter="get_channel" default="0"> + The MIDI channel of this input event. There are 16 channels, so this value ranges from 0 to 15. MIDI channel 9 is reserved for the use with percussion instruments, the rest of the channels are for non-percussion instruments. </member> <member name="controller_number" type="int" setter="set_controller_number" getter="get_controller_number" default="0"> + If the message is [code]MIDI_MESSAGE_CONTROL_CHANGE[/code], this indicates the controller number, otherwise this is zero. Controllers include devices such as pedals and levers. </member> <member name="controller_value" type="int" setter="set_controller_value" getter="get_controller_value" default="0"> + If the message is [code]MIDI_MESSAGE_CONTROL_CHANGE[/code], this indicates the controller value, otherwise this is zero. Controllers include devices such as pedals and levers. </member> <member name="instrument" type="int" setter="set_instrument" getter="get_instrument" default="0"> + The instrument of this input event. This value ranges from 0 to 127. Refer to the instrument list on the General MIDI wikipedia article to see a list of instruments, except that this value is 0-index, so subtract one from every number on that chart. A standard piano will have an instrument number of 0. </member> <member name="message" type="int" setter="set_message" getter="get_message" enum="MIDIMessage" default="0"> + Returns a value indicating the type of message for this MIDI signal. This is a member of the MIDIMessage enum. + For MIDI messages between 0x80 and 0xEF, only the left half of the bits are returned as this value, as the other part is the channel (ex: 0x94 becomes 0x9). For MIDI messages from 0xF0 to 0xFF, the value is returned as-is. + Notes will return [code]MIDI_MESSAGE_NOTE_ON[/code] when activated, but they might not always return [code]MIDI_MESSAGE_NOTE_OFF[/code] when deactivated, therefore your code should treat the input as stopped if some period of time has passed. + For more information, see the MIDI message status byte list chart linked above. </member> <member name="pitch" type="int" setter="set_pitch" getter="get_pitch" default="0"> + The pitch index number of this MIDI signal. This value ranges from 0 to 127. On a piano, middle C is 60, and A440 is 69, see the "MIDI note" column of the piano key frequency chart on Wikipedia for more information. </member> <member name="pressure" type="int" setter="set_pressure" getter="get_pressure" default="0"> + The pressure of the MIDI signal. This value ranges from 0 to 127. For many devices, this value is always zero. </member> <member name="velocity" type="int" setter="set_velocity" getter="get_velocity" default="0"> + The velocity of the MIDI signal. This value ranges from 0 to 127. For a piano, this corresponds to how quickly the key was pressed, and is rarely above about 110 in practice. </member> </members> </class> |