Logic Pro audio cracking and delayed sound with Scarlet 18i20 on MacBook Pro M4 Max

Question

Level 1

4 points

Logic Pro audio cracking and delayed sound with Scarlet 18i20 on MacBook Pro M4 Max

Tested with Logic Pro 11.0.1 and 11.2.2

When i record with my scarlet 2i2 i have no issues, but when use my scarlet 18i20 every 5 seconds or so I hear a "crack" and the sound gets delayed and shrinked. It's both a playback and a recording issue, because if I export the section, the cracks in the sound still present.

It happens on my Macbook Pro M4 Max but not with my Macbook pro M1, any clues?

My M4 came with macOS 26, I even tried downgrading my mac to macOS Sequoia 15.7.2 and it still happens.

[Re-Titled by Moderator]

Original Title: Logic Pro audio

MacBook Pro 14″

Posted on Nov 19, 2025 7:04 AM

Reply

Answer 1

yoyoBen

Level 4

3,403 points

Nov 19, 2025 11:34 PM in response to diegomarcher

Make sure your Mac's Mic Mode is set to "Standard". You can access it either in the control center or by clicking on the orange mic icon when logic is active.

Check if your focusrite drivers and software are up-to-date.

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Answer 2

Nov 19, 2025 7:57 AM in response to diegomarcher

Have you checked with the folks at Focusrite for support?

Perhaps they are aware of some issue and/or can provide a firmware update or other guidance for the use of the device.

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Answer 3

diegomarcher Author

Level 1

4 points

Nov 20, 2025 5:37 AM in response to yoyoBen

Yeah I checked that, all software updates are installed but still, no luck

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Answer 4

diegomarcher Author

Level 1

4 points

Nov 20, 2025 5:42 AM in response to D.I. Johnson

Yeah I asked there, but no luck either. This is working perfectly on my M1 macbook but not on my M4 one... It seems like an issue with either the M4 Max chip or the Macbook itself.

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