for NSX-39

nsx.coffee

class NSX39

  midi = require 'midi'
  buffer =
    key: 0
    vel: 0

  device: new midi.output()

  constructor: (pattern = /NSX-39/gi)->
    for i in [0...@device.getPortCount()]
      if pattern.test @device.getPortName i
        return @device.openPort i
    throw new Error 'NSX-39 not found.'

  note: (start, key, vel, gm = no) ->
    if start
      @device.sendMessage [
        (if gm then 0x91 else 0x90)
        (buffer.key = key)
        (buffer.vel = vel)
      ]
    else
      @device.sendMessage [
        0x80
        buffer.key
        buffer.vel
      ]

  talk: (byte) ->
    @device.sendMessage [
      0xF0
      0x43
      0x79
      0x09
      0x11
      0x0A
      0x00
      byte
      0xF7
    ]


nsx = new NSX39()
nsx.note on, 80, 100 # key, velocity
nsx.talk 0x00        # 巻末参照
setTimeout ->
  nsx.note off
, 1000