Improved Midi objects

Midi messages in Lua

Lua scripts can now receive midi messages (set with the lua_pushmidi function of LuaScript). These messages appear as a table with the following capacities:

msg.channel  -- midi channel

msg.type     -- msg type, see below

-- 'NoteOn', 'NoteOff'
msg.note     -- note value as number
msg.velocity -- note velocity

-- 'Ctrl'
msg.ctrl     -- ctrl change number
msg.value    -- ctrl value

-- Clock related: , 'Start', 'Stop', '.' (clock tick), 'Continue'

-- Other: '?'

New MidiIn object

(the Midi object has been renamed to “MidiOut”)

The new midi in object receives midi events from other sources (use MidiIn.list to get sources list). Outputs are:

  OUTLET(MidiIn,all)    // 1
  OUTLET(MidiIn,notes)  // 2
  OUTLET(MidiIn,ctrl)   // 3
  OUTLET(MidiIn,clock)  // 4
  OUTLET(MidiIn,tick)   // 5

The ‘clock’ outlet can be used to start/stop and sync a beat machine. For example:

mii = MidiIn(0)
mii.4 => l
l = Lua(load:"beatmachine.lua")
l => miout
miout = MidiOut(0)

The lua script receives 24 ticks per quarter note (“noire”).

quantize input

This is a simple example to quantize midi input with rubyk:

mii = MidiIn()  # midi input (virtual port)
mii.2 => 2.v    # send notes to 'set_value' port of Value (no bang)
v = Value()
mii.5 => b      # send ticks to 'bang'
b = Bang()
b => v          # send 'bang' to Value object outputs midi notes
v => mio        # send notes to midi out
mio = MidiOut() # midi output (virtual port)