Level 1

13 points

Logic Pro X found audio files in 8 bit format

Every time a open my project the alert pops out:

"Logic Pro X found 8 audio files in 8 bit format. / This format is unsupported and cannot be played back."

Some of the regions that were fine previously stopped playing and I've lost the tracks that I recorded on Saturday.

After recording I bounced a project to send my friend a rough mix, but when I got home and checked it on different speakers, I decided to tweak it a bit. That's when I noticed some of the files were gone. How could this happen?

I've located corrupted audio files on my disk and the couldn't be played with iTunes.

Logic Pro X: 10.3.3

Macbook 15 inch with touch bar and Touch ID on High Sierra: 10.13.2

FileVault was turned on – I turned it off since.

P.S. Maybe there was a software update in between bouncing and me reopening the project.

MacBook Pro TouchBar and Touch ID, macOS High Sierra (10.13.2), Logic Pro X: 10.3.3

Posted on Dec 18, 2017 11:37 PM

26 replies

Rainburst Author

Level 1

13 points

Dec 19, 2017 5:36 AM in response to Rainburst

I have contacted Apple support and uploaded files for the investigation. I will update the post if new details are uncovered

Pancenter

Level 6

14,820 points

Dec 22, 2017 8:59 PM in response to Pancenter

Just checking to make sure you received the file I sent back.

Pancenter

Level 6

14,820 points

Jan 3, 2018 9:34 AM in response to Rainburst

Your situation sounds like a possible hardware failure. You said the file I edited and sent back was still distorted, yet it was perfectly clear on both my Mac & PC. That sounds like hardware.

Rainburst Author

Level 1

13 points

Feb 6, 2018 5:40 AM in response to casey_hurd

I will.

Feb 18, 2018 1:33 PM in response to Rainburst

Any update on this? Has Logic corrupted any files yet since updating? Thanks!

Rainburst Author

Level 1

13 points

Feb 19, 2018 7:04 AM in response to casey_hurd

I wasn't able to reproduce it on my system

Rainburst Author

Level 1

13 points

Feb 19, 2018 7:05 AM in response to volker171

Hi volker171, thanks for sharing your experience! What version of Logic are you using?

Feb 21, 2018 6:27 PM in response to Pancenter

Pancenter, thanks for the offer. I'll give it a shot and take you up on it ;-)
Couldn't seem to spot a way to write you a personal message, or is that not possible in this forum..?

Cheers volker

Rainburst Author

Level 1

13 points

Dec 21, 2017 5:33 AM in response to Pancenter

Thanks, Pancenter. I have checked the disk for errors and none were found. I used Soundhack app to restore the audio file header and it partially worked. I've managed to make the file playable again but I couldn't figure out a way to remove the digital noise. Looks like the data is still intact, but the capabilities of sound hack does not cover the particular format.

Rainburst Author

Level 1

13 points

Jan 3, 2018 1:44 PM in response to Pancenter

Actually I've listened to the files you've recovered on several devices - it is not distortion, it's the background noise. Like white or pink. It's similar to what you'll get by cranking up mic preamp level. I've checked again on my Windows laptop - it's definitely present. The recording was digital in nature - it was done through kemper - so there was absolutely no noise.

The problem on my mac may be hardware fault, but this is not an argument in support of this theory.

Rainburst Author

Level 1

13 points

Feb 5, 2018 8:29 AM in response to Rainburst

Seems like this problem was fixed in 10.4 though I couldn't find details in update notes.

Works perfectly so far.

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Logic Pro X found audio files in 8 bit format