Output issue with M3 Mac running Sequoia 15.2 and Logic Pro 11.2 with Avid Carbon interface

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Level 1

4 points

Output issue with M3 Mac running Sequoia 15.2 and Logic Pro 11.2 with Avid Carbon interface

Hi, I'm sending outputs 1-2 to our control room stereo monitors, and outputs 3-4 to our headphone amp. This configuration works when we're using Pro Tools as the DAW, but when we switch to Logic Pro, I can see audio making it to outputs 3-4 within the Logic Pro DAW, but it's not making it out of the carbon to the headphone amp. Is this a os 15.2 compatibility issue? Any help is much appreciated.

iMac 24″, macOS 15.2

Posted on Jun 28, 2025 11:13 AM

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Answer 1

EddieGrey

Level 4

2,000 points

Jun 28, 2025 05:07 PM in response to studionmg630

Logic Pro has this weird behavior. Stereo output, one and two are hardwired to Logic Pro. Your interface will use input 1-2 but can only read it as 3-4 due to this aberrant behavior.

In my experience, you cannot replace this as you can in Ableton and other DAW’s. There might be a way to do this. I will let other folks chime in.

Here is my workaround. Because 1-2 are automatically assigned, you are going to have to play a mental game.

1-2 is going to have to be assigned as 3-4. Play with the ins and outs and you should get there. Just bear in mind, that output one and two is NOT 1-2 but 3-4. Blessings 🙏

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Answer 2

studionmg630 Author

Level 1

4 points

Jul 5, 2025 08:56 PM in response to EddieGrey

Thanks for the input!

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Answer 3

EddieGrey

Level 4

2,000 points

Jul 5, 2025 09:41 PM in response to studionmg630

Hope this helped and hope it made sense.

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