That was a bug. Your reply on M10.2.15 made me realize that. Thx.sl23 wrote: Wed Apr 22, 2026 10:54 am It's because M10.2.15 saved each colour section as a separate file
MuLab 10.2.29 beta
- KVRAF
- Topic Starter
- 13851 posts since 24 Jun, 2008 from Europe
- KVRAF
- 3139 posts since 28 Mar, 2008 from a Galaxy S7 far far away
- KVRist
- 68 posts since 5 Mar, 2020
Sorry for the delay, but I've had a busy weekMuTools wrote: Tue Apr 21, 2026 3:11 pmNo news on this?Bax9 wrote: Thu Apr 16, 2026 12:34 pm I'll make further test as soon as possible.
I found this issue yesterday during rehearsal, so I can't tell you what's the variable.
Anyway, playing a project and MAYBE playing some MuDrum sounds with keyboard/pads.
I can confirm that, while I'm playing back a project, after a random tempo, the MIDI becomes unstable with stuck notes and parts that either play or don't play.
Usually, just clicking PANIC fixes the issue, but some MIDI synths remain with notes with infinite sustain.
It happens to me with all projects.
- KVRAF
- Topic Starter
- 13851 posts since 24 Jun, 2008 from Europe
Does it also happen when doing this:
Please try sufficiently hard as this is an important test to narrow down the issue.
If it happens please also try the same test with the MuLab 10.1.
I can also report this:
Using the above test i tried to repeat the issue by playing MIDI input using a Impact LX 25+.
When rapidly playing random notes and also moving the mod wheel at the same time, from time to time i got a hanging note. I double-checked the raw MIDI input data with the debugger and indeed sometimes MIDI note messages were simply not coming into MuLab. That's at the very raw midi input that comes from the device driver. Then i checked in 3 other daws, the very same issue. It is independent from MuLab and i assume it's a bug in the MIDI driver, maybe related to running status. Then i checked the device driver for Impact LX 25+ and Windows tells it's up to date, and i saw the device driver is made by Microsoft. So maybe this is a more widespread issue in Windows MIDI? Anyone who knows more about this?
- Launch MuLab 10.2.14 or up and choose New Project
- Simply play Basic Synth from your MIDI keyboard
Please try sufficiently hard as this is an important test to narrow down the issue.
If it happens please also try the same test with the MuLab 10.1.
I can also report this:
Using the above test i tried to repeat the issue by playing MIDI input using a Impact LX 25+.
When rapidly playing random notes and also moving the mod wheel at the same time, from time to time i got a hanging note. I double-checked the raw MIDI input data with the debugger and indeed sometimes MIDI note messages were simply not coming into MuLab. That's at the very raw midi input that comes from the device driver. Then i checked in 3 other daws, the very same issue. It is independent from MuLab and i assume it's a bug in the MIDI driver, maybe related to running status. Then i checked the device driver for Impact LX 25+ and Windows tells it's up to date, and i saw the device driver is made by Microsoft. So maybe this is a more widespread issue in Windows MIDI? Anyone who knows more about this?
- KVRist
- 68 posts since 5 Mar, 2020
I'll do all the tests, by now I can say you that every project or new project, WITHOUT INPUT MIDI so not playing keyboards but only playing back a song/arrangement, at certain point start to get crazy
some note disappears, some notes stucks open ...
some note disappears, some notes stucks open ...
- KVRAF
- Topic Starter
- 13851 posts since 24 Jun, 2008 from Europe
The past week i also tested playing projects without MIDI input, no problems detected.
So lets try to narrow this down:
Can you / anyone repeat stuck notes or other odd issues using any of the demo projects?
If not then it sounds like this is a project dependent issue.
Then select the most simple project that does repeat the issue. Then remove all plugins from that project as long as the issue still repeats. Goal is to make an as simple and light project as possible that still causes the problems you describe. Then please send me that project together with a description what i have to do to repeat the issue.
If you don't have the time to simplify the project, then send me the project as is, as long as the issue is easily repeatable using a step-by-step description.
So lets try to narrow this down:
Can you / anyone repeat stuck notes or other odd issues using any of the demo projects?
If not then it sounds like this is a project dependent issue.
Then select the most simple project that does repeat the issue. Then remove all plugins from that project as long as the issue still repeats. Goal is to make an as simple and light project as possible that still causes the problems you describe. Then please send me that project together with a description what i have to do to repeat the issue.
If you don't have the time to simplify the project, then send me the project as is, as long as the issue is easily repeatable using a step-by-step description.
- KVRAF
- Topic Starter
- 13851 posts since 24 Jun, 2008 from Europe
MuLab App M10.2.17 beta is available:
https://www.mutools.com/mulab/app/lates ... /beta.html
This includes both the Windows 64 bit and Mac beta updates.
MuLab Plugin M10.2.17 beta for Windows 64 bit is available:
https://www.mutools.com/mulab/plugin/la ... /beta.html
What's changed since M10.2.16:
https://www.mutools.com/mulab-mux-change-log.html
(preview version, will be polished soon)
https://www.mutools.com/mulab/app/lates ... /beta.html
This includes both the Windows 64 bit and Mac beta updates.
MuLab Plugin M10.2.17 beta for Windows 64 bit is available:
https://www.mutools.com/mulab/plugin/la ... /beta.html
What's changed since M10.2.16:
- Color Preferences editor now memorizes the selected group.
- Extra color prefs and finetuned default color.
- Other small improvements.
https://www.mutools.com/mulab-mux-change-log.html
(preview version, will be polished soon)
- KVRAF
- 2469 posts since 25 Sep, 2014 from Specific Northwest
I'm not sure if this is a bug or a feature. Using Mac. In Preferences, I've set Audio Recording Type to WAVE. When I freeze a track with Render to Audio Track(s), the resulting file is still AIFF.
I know I'm probably a weirdo in this, but in 25+ years of audio on Mac, I've never used AIFF and find them more of a nuisance than anything.
Also, is there a way to render just a MIDI clip rather than the whole track? I don't see anything helpful in the context menu. Again, this is my usual workflow for wimpy CPU machines.
Edit: using v10.1.23. Just noticed 10.2 beta now available for Mac.
I know I'm probably a weirdo in this, but in 25+ years of audio on Mac, I've never used AIFF and find them more of a nuisance than anything.
Also, is there a way to render just a MIDI clip rather than the whole track? I don't see anything helpful in the context menu. Again, this is my usual workflow for wimpy CPU machines.
Edit: using v10.1.23. Just noticed 10.2 beta now available for Mac.
I started on Logic 5 with a PowerBook G4 550Mhz. I now have a MacBook Air M1 and it's ~165x faster! So, why is my music not proportionally better? 
- KVRAF
- Topic Starter
- 13851 posts since 24 Jun, 2008 from Europe
That preference is only used for recording, not yet for exporting, but will change that.syntonica wrote: Sun Apr 26, 2026 11:13 pm I'm not sure if this is a bug or a feature. Using Mac. In Preferences, I've set Audio Recording Type to WAVE. When I freeze a track with Render to Audio Track(s), the resulting file is still AIFF.
I'll have a look at it.Also, is there a way to render just a MIDI clip rather than the whole track? I don't see anything helpful in the context menu. Again, this is my usual workflow for wimpy CPU machines.
Is MuLab 10.2.17 working fine on your Mac?Edit: using v10.1.23. Just noticed 10.2 beta now available for Mac.
- KVRAF
- 2469 posts since 25 Sep, 2014 from Specific Northwest
So far, so good. I'm making a minimal, very portable setup on little laptop with an old CPU and getting into some things I haven't used before.
About rendering single midi clips, just tossing the result into the media browser, or specified folder, would be enough. Thanks very much for taking a look at it.
I started on Logic 5 with a PowerBook G4 550Mhz. I now have a MacBook Air M1 and it's ~165x faster! So, why is my music not proportionally better? 
- KVRAF
- Topic Starter
- 13851 posts since 24 Jun, 2008 from Europe
Oh, if it's about exporting a single clip then that's already possible by simply selecting the clip(s) you want to export as audio and then do Export Composition As Audio File.syntonica wrote: Mon Apr 27, 2026 4:08 pm About rendering single midi clips, just tossing the result into the media browser, or specified folder, would be enough. Thanks very much for taking a look at it.
- KVRAF
- 2469 posts since 25 Sep, 2014 from Specific Northwest
I don't see that anywhere. I'm right-clicking on MIDI clips, which I guess are Sequences? Sorry if I'm conflating terminology. I want to render them to audio, with or without effects, to arrange with.MuTools wrote: Mon Apr 27, 2026 4:42 pmOh, if it's about exporting a single clip then that's already possible by simply selecting the clip(s) you want to export as audio and then do Export Composition As Audio File.syntonica wrote: Mon Apr 27, 2026 4:08 pm About rendering single midi clips, just tossing the result into the media browser, or specified folder, would be enough. Thanks very much for taking a look at it.
I started on Logic 5 with a PowerBook G4 550Mhz. I now have a MacBook Air M1 and it's ~165x faster! So, why is my music not proportionally better? 
- KVRAF
- Topic Starter
- 13851 posts since 24 Jun, 2008 from Europe
- Select one or more clips
- Composer options button -> Export As Audio File
You do not have the required permissions to view the files attached to this post.
- KVRAF
- 2469 posts since 25 Sep, 2014 from Specific Northwest
Perfect! Thank you!
Also, why have I never noticed this menu before?
Also, why have I never noticed this menu before?
I started on Logic 5 with a PowerBook G4 550Mhz. I now have a MacBook Air M1 and it's ~165x faster! So, why is my music not proportionally better? 
- KVRist
- 121 posts since 7 Apr, 2008 from germany
HI:MuTools wrote: Sun Apr 26, 2026 10:34 pm MuLab App M10.2.17 beta is available:
https://www.mutools.com/mulab/app/lates ... /beta.html
This includes both the Windows 64 bit and Mac beta updates.
MuLab Plugin M10.2.17 beta for Windows 64 bit is available:
https://www.mutools.com/mulab/plugin/la ... /beta.html
What's changed since M10.2.16:
The total change log since M10.1.23 is available here:
- Color Preferences editor now memorizes the selected group.
- Extra color prefs and finetuned default color.
- Other small improvements.
https://www.mutools.com/mulab-mux-change-log.html
(preview version, will be polished soon)
1. AUDIO-Problems:
I sent you a video because crackling and "audio will be lowering" if click on audiocable.
simple to reproduce.
2. You wrote in mulab-mux-change-log: "mulab-mux-change-log":
-> "Fixed a serious timing issue on the output events coming from a VST3 plugin." <-
BUT: in the actual version 10.2.17 (MAC) it isn'nt fixed. (Tested with STEPIC-VST from Devicemeister). The same bug like I wrote you a long time ago. (delayed Midi-Output while MuLab is in recordmode)
