Using Stereo Bus added to Outputs and Control Room causes Cubase 14 & 15 to crash when used!

I have both Cubase 14 & 15 set up to go to a 5.1 bus. I want to create an additional output bus for stereo mixdown as well, however when I add a “Stereo Bus” to the Outputs (which shares the 5.1 Front Left and 5.1 Front Right speakers), then mark them as “Not Connected” (as is everything else in the “Outputs” section, an entry in the Control Room tab that is a Stereo Output appears. I was hoping to be able to choose this output bus in the Control Room for the routing of my tracks.

Alas, both in Cubase 14 and Cubase 15, as soon as I select the “Stereo” output bus for a track’s output routing, Cubase completely crashes.

Am I doing something wrong, or is this just a serious bug in the two recent releases of Cubase Pro?

I am having great difficulties with Cubase after installing Cubase 15. I think I switched too soon. However, it appears that whatever is wrong with Cubase 15 has also affected Cubase 14 which is now also unstable (after a year of constant usage without problems).

HELP!

Please upload the crash dumps that ought to be created upon application crash.

I tried to upload the crash dump, but it’s 132,000 long, and the forum truncates it. This is the dump created by MacOS. Is there one created by Cubase that is of a sufficiently small size to upload it on the forum? If so, please enlighten me as to where it is stored. Thank you!

MacOS is not really my strong suit. Can you zip the .ips file? It should get significantly smaller like this. I don’t know what 132’000 means as the unit is missing. KByte perhaps?

The Audio connection window has severel panes ; Input, Output, …,…, Control Room

In Cubase you can use either >Output or Control Room, but not both. They are mutually canselling. So if you want to set up a separate stereo output in addition to your 5.1 setup etc, you have to do it in the same Pane, either output or control room. If you activate CR it will take over the output abillity from output pane and deactivate what’s there.

Or have I misread your question?

The unit is characters (could be one or two bytes per). Regardless, when I copy and paste it into the forum, the forum says it’s too big by an order of magnitude.

I just figured out how to upload the file. This happens when I close a simple project with a single track of me basically saying, “testing, one, two, three”. No plug-ins or inserts.

Please let me know if you can identify the source of the failure.

Thanks!

Cubase 15-2025-11-11-155838.ips (225.2 KB)

Here’s another one… (I sent this one to Steinberg also):

Cubase 15-2025-11-11-161329.ips (225.2 KB)

Are you sure? To me it seems the busses in the Output tab continue to work just the same. The preview channel gets re-routed from the main output bus to the Control Room, though.

@Martin.Jirsak : Mac crash report(s), C15.0.5.121, change output routing of audio track to another output bus

In the VST-Control Room settings, there’s Exclusive Device Ports for Monitor Channels. If it’s not checked, you can have the same outputs for both Control Room and Stereo Out–but I’m pretty sure it will output to both destinations at the same time if they’re both “un-muted.”

Do you think that causes the crash?

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Hi,

Both of the crashes are in Melodyne:

0   MelodyneCoreF                 	       0x12f134038 0x12e478000 + 13353016
1   MelodyneCoreF                 	       0x12eec6bb0 0x12e478000 + 10808240
2   MelodyneCoreF                 	       0x12eec5dd4 0x12e478000 + 10804692
3   MelodyneCoreF                 	       0x12f067ba8 0x12e478000 + 12516264```
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It didn’t crash for me when I was testing-out the feature, but I keep the main output disabled and just use Control Room.

Well,…It does here at least. When I configure the conttrol room and use the Monitor 1 as main output, the Output at Output pane is automatically disabled.

But. I may be wrong as I doesn’t set any 5.1 config or sim. I have UR44 as interface btw.

I think there is a setting whether this happens or not. And then it will only happen to the bus that is defined as the Main Mix. All other output busses should be unaffected. If I understood OP correctly they are using such an additional bus.

In Preferernces setting!

So I learned something new today. I wasn’t aware of this option; it deffinitly does allow both output option, both at output tab and at control room tab simultanesly.

OK – I have narrowed things down a bit. After creating a main 5.1 mix, I created three monitors in the Control Room: 5.1, Stereo, Mono. Selecting either of the two secondary monitors (Stereo or Mono) as output bus of a channel causes Cubase to crash instantly. (Side note: I am no longer getting notified any more when Cubase unexpectedly crashes, or an offer to send the core-dump to Apple). After searching around the manual and YouTube videos, I have come to realize that the proper way to use Control Room monitors is just to select them from the Control Room panel, and Cubase does the rest through its “MixConvert” settings – which I have not modified from their default. This seems to work well (now that I’m using it correctly). However, Cubase should not crash if someone like me doesn’t know how to use it. So, I think this is a bug. This incorrect usage of the Control Room Monitor capability should not crash the system.

I am not altogether sure what the Cubase 15 preference, “Exclusive Device Ports for Monitor Channels” is for, or if I should be using it. @Buer, you mentioned this setting in your last post. What do you mean by “output tab”? How is this different from Monitor Channels? Is my “crashing” behavior caused by accessing “output tabs”?

Time to hit the books again.

Thanks for all of your discussion

Hi,

How did you use it before? What was your setup, please?

Well,….your car may crasj if you not follow recommended instructions for using it, so why not a software? :shushing_face:

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