Old 03-05-2017, 03:46 PM   #1
airon
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Default Midi messages command queue

Just a quick one.

I wrote a bunch of little scripts to do the following, simple things :

  • Send a midi command to one device to change its bank(Midi Fighter Twister in this case)
  • Light up one in a group of four buttons and clear the others


The basic command to do this is reaper.StuffMIDIMessage.

I hope this is useful to someone. It certainly helps me mix more quickly.

One version without comments, the second has lots of comments in it, which is what I prefer..

Code:
local m_com = {
          {   device = "Twister1", -- will be replaced with  target device number+16 for actual command
              midicmd = '0x9'..string.format("%x", 3), -- NoteOn on midi channel 0-15
              midinotecc = 0 , -- bank no.1
              vel = 127 }, -- velocity or CC value

          {   device = "Xmini1",
              midicmd = '0x9'..string.format("%x", 0),
              midinotecc = 8 ,
              vel = 1 },
          {   device = "Xmini1",
              midicmd = '0x9'..string.format("%x", 0),
              midinotecc = 9 ,
              vel = 0 },
          {  device = "Xmini1",
              midicmd = '0x9'..string.format("%x", 0),
              midinotecc = 10 ,
              vel = 0 },
          {   device = "Xmini1",
              midicmd = '0x9'..string.format("%x", 0),
              midinotecc = 11 ,
              vel = 0 }
}
local target_devices = {} ; local i,k = 0 , 0 ; local mdev_outno = reaper.GetNumMIDIOutputs()

for k=1, #m_com, 1 do ; target_devices[k] = m_com[k].device ; end

for k=1, #target_devices, 1 do
  for i=1, mdev_outno, 1 do
    retval, mdev_name = reaper.GetMIDIOutputName(i, "")
    if retval then
      if string.find(mdev_name,target_devices[k]) then -- check for target device name(s)
        m_com[k].target_devnum = i -- add device number to command list
      end
    end
  end
end

for i=1, #m_com, 1 do
  reaper.StuffMIDIMessage( tonumber(m_com[i].target_devnum)+16 , m_com[i].midicmd, m_com[i].midinotecc, m_com[i].vel )
end



Code:
local m_com = {
  -- Access to commands via m_com[1] and so on
  -- m_com[k].target_devnum will hold the devices number for each command
  -- Both devices in this example are renamed from their default names to something small and specific
  -- "Midi Fighter Twister" became "Twister1" because I have two of them. The X-Touch Mini was renamed to have shorter name

  -- Twister1, NoteOn channel 4, Note 3(bank no.4), velocity 127
          {   device = "Twister1", -- will be replaced with  target device number+16 for actual command
              midicmd = '0x9'..string.format("%x", 3), -- NoteOn on midi channel 0-15
              midinotecc = 0 , -- bank no.1
              vel = 127 }, -- velocity or CC value
  -- X-TOUCH MINI, NoteOn channel 11, Note , velocity 1 (button ON)
  -- Turn OFF other buttons
  -- NOTE for X-Touch Mini: Buttons have to be in TOGGLE mode, set via the editor
          {   device = "Xmini1",
              midicmd = '0x9'..string.format("%x", 0), -- NoteOn on midi channel 1
              midinotecc = 8 , -- Bottom row, button 1 from the left
              vel = 1 }, -- button ON
          {   device = "Xmini1",
              midicmd = '0x9'..string.format("%x", 0), -- NoteOn on midi channel 1
              midinotecc = 9 , -- Bottom row, button 2 from the left
              vel = 0 }, -- button OFF
          {  device = "Xmini1",
              midicmd = '0x9'..string.format("%x", 0), -- NoteOn on midi channel 1
              midinotecc = 10 , -- Bottom row, button 3 from the left
              vel = 0 }, -- button OFF
          {   device = "Xmini1",
              midicmd = '0x9'..string.format("%x", 0), -- NoteOn on midi channel 1
              midinotecc = 11 , -- Bottom row, button 4 from the left
              vel = 0 }, -- button OFF
}
local target_devices = {}
local i,k = 0 , 0
local mdev_outno = reaper.GetNumMIDIOutputs() -- grab number of midi outputs in Reaper

-- collect device ids for each command
for k=1, #m_com, 1 do
  target_devices[k] = m_com[k].device
end

for k=1, #target_devices, 1 do
  for i=1, mdev_outno, 1 do
    retval, mdev_name = reaper.GetMIDIOutputName(i, "")
    if retval then
      if string.find(mdev_name,target_devices[k]) then -- check for target device name(s)
        m_com[k].target_devnum = i -- add device number to command list
      end
    end
  end
end
-- Now we have the current device ID for each device we'll be targeting, so away we go.
for i=1, #m_com, 1 do
  reaper.StuffMIDIMessage( tonumber(m_com[i].target_devnum)+16 , m_com[i].midicmd, m_com[i].midinotecc, m_com[i].vel )
end
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Last edited by airon; 03-06-2017 at 04:47 AM.
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Old 03-07-2017, 03:07 AM   #2
airon
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For any script writers, I added an almost comment-less version.

It makes sending stacks of midi commands to a target by device name, which you can change in the Preferences/Midi Devices section for each input and output device, a little easier.

If you have any questions, ideas or requests, write them down here.
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Old 03-07-2017, 06:00 AM   #3
mccrabney
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Default

thanks for this, this kind of thing is going to be important moving forward and applies well to stuff like the launchpad.

is there any library that would allow for midi to be scripted in such a way that doesn't require entering the values in hex?

off topic, but is there any way to test whether or not a function is enabled (global input quantize for example) and blast a midi value if so?
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Old 03-08-2017, 02:52 AM   #4
airon
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That's a good question. You may want to put that question in to its own thread. Some midi folks here can probably answer that question if they see it.
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