[PD] SysEx In issue

Lucas Cordiviola lucarda27 at hotmail.com
Mon Feb 11 16:19:34 CET 2019

I did a test patch (attached)

- I can send 7 byte sysex messages up to every 3ms

- I can send noteout up to every 2ms

This tests gave same results if using a midicable (cable loop on the sound-card) or using a virtual driver.

Mensaje telepatico asistido por maquinas.

On 2/11/2019 10:55 AM, Dan Wilcox wrote:
(responding again in thread)

It is most likely a bug, maybe introduced in the MIDI overhaul I did for 0.48. Does the same issue occur in 0.47?

Can make a *re-produceable* patch and/or project for testing and open an issue on the pure-data Github repo? The simplest thing for me would be the syses messages you're sending as bytes.

You could also check the output of the midi tester patch I added:

Browser -> Pure Data/7.stuff/tools/miditester.pd


Not too long ago I wrote here reporting an issue with receiving SysEx
When Pd receives a big quantity of SysEx, the MIDI IN port 'gets stuck' and
then you need to go to 'Media->MIDI settings...' and re-select the port,
otherwise no MIDI messages will be received anymore.
Here's a video that shows the issue:
it's a private video, the pass is: sysexissue
Does anybody know what could cause this behavior and if it's possible to
'fix it'?
The first time I reported it, it was when I stumbled on this using my
personal Linux machine and Miller Puckette suggested to change the MIDI
buffer in the source code, but unfortunately also setting that to something
insane like 2^20, the issue was still there.
Now I double checked on MacOS Sierra and Windows 10 and it is the same.


Dan Wilcox

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