midi
control
| Syntax | Description |
|---|---|
| my_midi = midi.connect(n) | Assign the connected MIDI device at this port to a script, defaults to port 1 unless n is specified |
| my_midi.event = function(data) | User script callback when this connected device receives MIDI message data |
| my_midi:send(data) | Send MIDI data to this connected device, eg. {144,60,127} = note on event for note 60 with velocity 127 |
| my_midi:note_on(note, vel, ch) | Send note on event to this connected device, unspecified velocity defaults to 100 and unspecified channel defaults to 1 |
| my_midi:note_off(note, vel, ch) | Send note off event to this connected device, unspecified velocity defaults to 100 and unspecified channel defaults to 1 |
| my_midi:cc(cc, val, ch) | Send cc event to this connected device, unspecified channel defaults to 1 |
| my_midi:pitchbend(val, ch) | Send pitchbend message to this connected device, unspecified channel defaults to 1 |
| my_midi:key_pressure(note, val, ch) | Send key pressure event to this connected device, unspecified channel defaults to 1 |
| my_midi:channel_pressure(val, ch) | Send channel pressure event to this connected device, unspecified channel defaults to 1 |
| my_midi:program_change(val, ch) | Send program change event to this connected device, unspecified channel defaults to 1 |
| my_midi:start() | Send start event to this connected device |
| my_midi:stop() | Send stop event to this connected device |
| my_midi:continue() | Send continue event to this connected device |
| my_midi:clock() | Send clock event to this connected device (nb. norns global clock can transmit MIDI clock without scripting) |
| my_midi:song_position(lsb, msb) | Send song position event to this connected device |
| my_midi:song_select(val) | Send song select event to this connected device |
| midi.remove() | User script callback when any midi device is removed |
| midi.to_msg | Convert MIDI data (bytes) to specific messages, eg. channel, velocity, note, type |
| midi.to_data | Convert MIDI messages to data (bytes) |
query
| Syntax | Description |
|---|---|
| midi.devices | Returns any presently-connected MIDI devices : table |
| midi.devices[x] | Returns information about this presently-connected MIDI device (.name, .dev, .id) : table |
| midi.vports | Returns all remembered MIDI devices : table |
| midi.vports[x] | Returns information about this remembered MIDI device (.name and control functions) : table |
example
function init()
midi_device = {} -- container for connected midi devices
devices_with_names = {}
target = 1
key3_hold = false
random_note = math.random(48,72)
for i = 1,#midi.vports do -- query all ports
midi_device[i] = midi.connect(i) -- connect each device
end
end
function enc(n,d)
if n == 2 then
if #midi_device > 0 then
target = util.clamp(target+d,1,#midi_device)
redraw()
end
end
end
function key(n,z)
if n == 3 then
if z == 1 then
midi_device[target]:note_on(random_note) -- defaults to velocity 100 on ch 1
key3_hold = true
redraw()
elseif z == 0 then
midi_device[target]:note_off(random_note)
random_note = math.random(50,70)
key3_hold = false
redraw()
end
end
end
function redraw()
screen.clear()
screen.move(0,10)
screen.text("midi port "..target..": "..midi_device[target].name)
screen.move(0,30)
if not key3_hold then
screen.text("press K3 to send note "..random_note)
else
screen.text("release K3 to kill note "..random_note)
end
screen.update()
end
description
Connect a script to MIDI hardware. Provides MIDI message and event communication between norns and external MIDI boxes, dongles, and hubs. When a MIDI device is connected to norns, its identity is stored in two tables: .vports and .devices
The .vports table reflects the MIDI devices norns has stored under SYSTEM > DEVICES > MIDI. It can therefore reflect devices not currently connected.
The .devices table reflects presently-connected MIDI devices. The general order is reflected under SYSTEM > DEVICES > MIDI > port – my_midi.devices[1].name will always return virtual, as its the first MIDI connection established by norns on boot. Subsequent device connections will consume sequential indices. However, if you remove and connect a device many times, each re-connect will increment the index. So, it is possible for a device to show up as the third item selectable under SYSTEM > DEVICES > MIDI > port, but it might occupy the fifth .device index.