Old 03-07-2023, 02:49 AM   #1
Viktor_S
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Default Send MIDI Sysex message from script (actions)

Could you please advise what is the best way to send MIDI Sysex message from script (actions) to external MIDI device?

Sysex MIDI message is
Code:
'F0 21 25 7F 47 50 2D 64 12 11 00 00 02 07 09 00 00 F7'
.

If I send it from MIDI editor everything works fine. But following command doesn't work in a proper way.

Code:
reaper.SendMIDIMessageToHardware(8, 'F0 21 25 7F 47 50 2D 64 12 11 00 00 02 07 09 00 00 F7')
I was trying following as well
Code:
reaper.SendMIDIMessageToHardware(8, '0xF0, 0x21, 0x25, 0x7F, 0x47, 0x50, 0x2D, 0x64, 0x12, 0x11, 0x00, 0x00, 0x02, 0x07, 0x09, 0x00, 0x00, 0xF7')
8 is device number in a MIDI out list.
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Old 03-07-2023, 04:47 AM   #2
mpl
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you have to send binary string, not regular

Last edited by mpl; 03-07-2023 at 05:07 AM.
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Old 03-07-2023, 06:07 AM   #3
Viktor_S
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Quote:
Originally Posted by mpl View Post
you have to send binary string, not regular
Thanks for your replay. Please tell me if I understand correctly that by a binary string you mean something like

Code:
'11110000 00100001 00100101 01111111 01000111 01010000 00101101 01100100 00010010 00010001 00000000 00000000 00000010 00000111 00000110 00000000 00000000 11110111'
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Old 03-07-2023, 06:31 AM   #4
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Code:
SysEx_msg = 'F0 21 25 7F 47 50 2D 64 12 11 00 00 02 07 09 00 00 F7'
SysEx_msg_bin = '' for hex in SysEx_msg:gmatch('[A-F,0-9]+') do SysEx_msg_bin = SysEx_msg_bin..string.char(tonumber(hex, 16)) end
reaper.SendMIDIMessageToHardware(HW_dev_outID, SysEx_msg_bin)
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Old 03-07-2023, 06:39 AM   #5
Viktor_S
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Quote:
Originally Posted by mpl View Post
Code:
SysEx_msg = 'F0 21 25 7F 47 50 2D 64 12 11 00 00 02 07 09 00 00 F7'
SysEx_msg_bin = '' for hex in SysEx_msg:gmatch('[A-F,0-9]+') do SysEx_msg_bin = SysEx_msg_bin..string.char(tonumber(hex, 16)) end
reaper.SendMIDIMessageToHardware(HW_dev_outID, SysEx_msg_bin)
Thank you very much! You helped me a lot.
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Old 03-07-2023, 12:02 PM   #6
JamesX
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Quote:
Originally Posted by mpl View Post
you have to send binary string, not regular
mpl,

Thanks for the script. Wonderful...
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Old 03-07-2023, 03:06 PM   #7
Viktor_S
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I believe that this script should be somehow fixed and highlighted in the API description.
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Old 02-11-2024, 08:59 AM   #8
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Another way to do it:

Code:
sysex = { 0xF0, 0x41, 0x10, 0x00, 0x00, 0x00, 0x05, 0x12, 0x20, 0x00, 0x40, 0x02, 0x18, 0x06, 0xF7 }
msg=''
for i=1, #sysex do msg = msg .. string.char(sysex[i]) end
deviceid=0
reaper.SendMIDIMessageToHardware(deviceid, msg)

Last edited by schwa; 02-11-2024 at 09:21 AM.
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Old 02-13-2024, 09:06 AM   #9
FeedTheCat
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Also useful in this context is that string.char can take multiple arguments. If one can avoid using tables, this is very fast and elegant:
Code:
msg = string.char(0xF0, 0x41, 0x10, 0x00, 0x00, 0x00, 0x05, 0x12, 0x20, 0x00, 0x40, 0x02, 0x18, 0x06, 0xF7)
deviceid = 0
reaper.SendMIDIMessageToHardware(deviceid, msg)
Alternatively it also works when a table is given:
Code:
sysex = {0xF0, 0x41, 0x10, 0x00, 0x00, 0x00, 0x05, 0x12, 0x20, 0x00, 0x40, 0x02, 0x18, 0x06, 0xF7}
deviceid = 0
reaper.SendMIDIMessageToHardware(deviceid, string.char(table.unpack(sysex)))
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Old 02-19-2024, 10:38 AM   #10
Kickaxe
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Default Midi receive help

I'm using reaper.SendMIDIMessageToHardware(deviceid, msg) to send a sysex request message to query a setting on my midi device. This works great but I can't figure out how to receive the sysex feedback message from my midi device. I know my sysex command works as I also sent it via Bome SendFX and Bome did receive the correct feedback. I just don't know how to get the feedback message back into my lua script. Any help would be greatly appreciated? Regards,
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Old 02-24-2024, 02:22 PM   #11
mschnell
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maybe ReaPack -> Midi CC to SysEx
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Old 02-24-2024, 03:59 PM   #12
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Added this thread to the Reaper Internals-Thread post that lists useful resources in the forum, so it doesn't get lost to time.
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