MIDI inputs duplicate (2x, 4x, 6x...) every time a new window is opened (v0.9.3)

[SapporoZero]

Description

In plugdata v0.9.3 (both Mac and Windows, Standalone), MIDI input messages get duplicated every time a new patch window is opened.

Steps to Reproduce

1. Open plugdata (v0.9.3).
2. Create a simple patch: [notein] -> [print] (or using [realtime] to check timestamps).
3. Press a MIDI key. It prints twice (which might be the expected default host/standalone routing).
4. Open a new window (File -> New).
5. Press the MIDI key again. Now it prints 4 times simultaneously.
6. Open more windows, and it duplicates further to 6 times, 8 times, and so on.

Expected Behavior

Opening new windows should not multiply or duplicate the incoming MIDI stream in the background.

Environment

• plugdata version: v0.9.3 (Standalone)
• OS: macOS / Windows 11 (Confirmed on both)
• Notes: Replacing [notein] with [midiin] + [midiparse] does not fix the issue. Reopening/restarting the app resets the duplicate count.

[dromer]

I can't test on macOS and Windows, but on Linux this works as expected.
Using just this patch I see individual notes. Opening new windows shows the messages in all of them, but not duplicated.

#X obj 143 86 notein;
#X obj 143 112 stripnote;
#X obj 143 138 print;
#X connect 0 0 1 0;
#X connect 0 1 1 1;
#X connect 1 0 2 0;

[timothyschoen]

Can you verify if this is still an issue on the nightly builds? I did make some fixes to MIDI device saving.

[SapporoZero]

@timothyschoen
Thank you! I tested it on macOS using the latest nightly build.

The good news is that the MIDI multiplication/duplication issue is completely resolved!

However, I noticed a new issue: the console in the newly opened window does not print any output anymore. Should I create a separate issue for this new console bug?

I haven't tested it on Windows yet. Please give me some time, and I will report back soon.

[SapporoZero]

@timothyschoen
I tested it on Windows too.

The original issue where the MIDI input multiplies/duplicates is completely resolved on both platforms! However, different new issues have emerged on each OS.

1. macOS Status:

• The MIDI duplication is fixed.
• New Issue: The console in a newly opened window shows no output until I click inside the patch panel (it seems to require focus to start printing).

2. Windows Status:

• The MIDI duplication is fixed.
• New Issue: If I open multiple windows that contain the [notein] object, the application completely freezes (hangs).

Please let me know if you need more detailed information, and I will gladly provide it.

[timothyschoen]

The console in a newly opened window shows no output until I click inside the patch panel (it seems to require focus to start printing).

Thanks for the update, I tried to reproduce this, but no luck here. Could you share a video of the steps needed to make this happen?

[SapporoZero]

@timothyschoen
Can you watch this video?