Moving implementation to Raspberry Pi/Node from Windows 10 error

Community Usage questions
1

I am in the process of moving a Windows 10 implementation to a Raspberry Pi 5 running OSC in node (v 1.27.1). I am using McLaren RtpMidi and all is good communicating to the workstation except for when I am sending this message (this worked in Win 10):

address: /program
preArgs:
[
  1,
  0
]
target: midi:oscToDaw

(ERROR, MIDI) Traceback (most recent call last):
File "/home/USER/OSC/open-stage-control_1.27.1_node/server/python/midi.py", line 300, in
send_midi(*msg)
File "/home/USER/OSC/open-stage-control_1.27.1_node/server/python/midi.py", line 285, in send_midi
outputs[name].send_message(m)
File "src/_rtmidi.pyx", line 1104, in rtmidi._rtmidi.MidiOut.send_message
File "src/_rtmidi.pyx", line 220, in rtmidi._rtmidi._cb_error_func
File "src/_rtmidi.pyx", line 417, in rtmidi._rtmidi._default_error_handler
ValueError: MidiOutAlsa::sendMessage: event parsing error!

WHERE AS NOTE CAN SEND.

address: /note
preArgs:
[
  1,
  0
]
target: midi:oscToDaw

Any suggestions?

Thank you

2

Yes, follow the MIDI configuration guide for "Other systems / Node" .
Sorry, I didn't read properly, I'll check it out and keep you posted.

3

Could you please check rtmidi's version:

python3 -c "import rtmidi; print(rtmidi.__version__)"

and ALSA's:

cat /proc/asound/version
4

Thanks for the reply.

python3 -c "import rtmidi; print (rtmidi.version)"
1.4.7
cat /proc/asound/version
Advanced Linux Sound Architecture Driver Version k6.6.51+rpt-rpi-2712.

5

Thanks. You'll need to install a more recent version of rtmidi as the minimal version required is 1.4.9, I should mention that in the docs.

6

Ok, I will try update in rtMidi

Thank you.

7

sudo apt install python3-rtmidi --upgrade
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
python3-rtmidi is already the newest version (1.4.7-1+b4).
0 upgraded, 0 newly installed, 0 to remove and 35 not upgraded.

Not available yet via apt on Pi 5. I will wait for apt to get there for my articulation switching.

Thanks.

8

Going to try to install an additional version of python etc.. that is managed via the base install

9

Took a bit of mucking about to get an additional version of python (3.13) with a version of rtmidi that meets OSC's requirements.

Seeing midi at the target, now to solve additional issues that in my setup/environment.

Your help and OSC in general is very much appreciated.

Thank you.

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