Why Am I Hearing Outputs 3/4 Through My Stereo Out

Question

Level 1

4 points

Why Am I Hearing Outputs 3/4 Through My Stereo Out

I keep hearing OUTPUTS 3/4 through my Stereo outputs (1/2).

I have a problem in a specific project where I’m trying to send audio through outputs 3/4 in Logic Pro, with the I/O plugin.

I'm hearing both the processed audio and the dry audio.

As if outputs 3/4 are somehow routed to my stereo out. I checked the output mirroring, it's not this. My interface isn’t monitoring it either, and when I work on different projects, the problem did not persist; meaning this is a project specific problem.

I’ve tried pressing command + zero to see if this is an environment problem, checking to see if outputs 3/4 have "cabling" on them. They do not seem to have any.

When the I/O plugin is set so that no input is selected I still hear outputs 3/4 DRY through my stereo output. I don’t know what to do.

If anyone could help, may God bless your good hearts.

It seems to be that no matter what I do, I CAN HEAR OUTPUTS 3/4 through 1/2.

MacBook Pro 14″, macOS 14.8

Posted on Dec 20, 2025 9:04 AM

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Answer 1

yoyoBen

Level 4

3,403 points

Dec 20, 2025 10:01 AM in response to ShalevMen

Only the last picture is taken from the mixer window, and it only shows a few channels with no I/O plugin inserted. Nobody can suggest a solution from these pictures....

Please minimize the size of the screenshots, you can do this in the post by moving the edges of the uploaded pictures.

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Answer 2

ShalevMen Author

Level 1

4 points

Dec 20, 2025 10:43 AM in response to ShalevMen

Also, this happens regardless of the track I put the I/O plugin on, and regardless of whether the Input is selected, when audio is sent through the I/O plugin to output 3/4, I hear it in the stereo out (and see it in Logic itself, meaning this has nothing to do with my audio device self monitoring the signal) - and if only output 3 is receiving audio, only the right channel of my stereo out gets that signal dry… Ie - I’m hearing outputs 3/4 through 1/2

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Answer 3

yoyoBen

Level 4

3,403 points

Dec 20, 2025 12:55 PM in response to ShalevMen

ShalevMen wrote:

Also, this happens regardless of the track I put the I/O plugin on,

If it has nothing to do with the I/O plugin, it could be because of a wrong cabling in Logic's Environment, a double routing in Logic's Mixer (check channel strips outputs or sends to busses) or a double routing in the control software of the soundcard...

What have you changed in the Environment?

Edit:

The project has 400 tracks approx, so there's no way of capturing them all.

I would test your issue in a fresh project with only a few tracks and without changing anything in the environment

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Answer 4

ShalevMen Author

Level 1

4 points

Dec 20, 2025 1:59 PM in response to yoyoBen

I tested it on a new project with the same soundcard software configuration and no problem was found, ie, everything worked perfectly. So it’s not a soundcard issue or a physical issue with the equipment, it’s specific to that project… And I cannot figure it out. I routed all of the tracks / buses (everything on the mixer) on it to stereo out, but the problem persisted, as if there’s a hidden connection or send of the dry 3/4 output to the stereo outs…

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Answer 5

yoyoBen

Level 4

3,403 points

Dec 20, 2025 9:30 AM in response to ShalevMen

It's hard to guess why this is happening, but it'svery likely caused by an user error.

Post a screenshot of your mixer window and the i/O plugin window.

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Answer 6

ShalevMen Author

Level 1

4 points

Dec 20, 2025 9:41 AM in response to yoyoBen

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Answer 7

yoyoBen

Level 4

3,403 points

Dec 20, 2025 10:09 AM in response to yoyoBen

BTW, don't mess around with the Environment, unless you really know what you are doing. It's not necessary and it only increases the chance of an error.

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Answer 8

ShalevMen Author

Level 1

4 points

Dec 20, 2025 10:30 AM in response to yoyoBen

I'm almost certain that me messing with the environment is the reason my issue started...

The project has 400 tracks approx, so there's no way of capturing them all.

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