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Why did Logic slice up my project???

Working on imported drum recordings, got a phone call, discussing previously found bug in Logic with friend. Opened Main and project preferences to look at settings as per our conversation. Closed menu boxes, finished conversation and when I looked back at the project this is what I found ! All those tracks with empty spaces were formally single regions, no divisions. On top of that the tracks that were not sliced, coincidentally the ones I had soloed, were also all moved from perfectly in sync to all out of sync. If I did this accidentally it must have been a single key stroke or gesture because I didn't notice it. And there is no record of it in the edit history at all. I have definitely been noticing some buggy behavior in Logic so naturally I'm wondering if this is yet another bug. I hope some one has some insight because this is very discouraging. Like one step forward and three huge steps back. Can't work like this! Hoping I did something stupid. This is on a new 2020 MacBook Pro 16" Catalina

Posted on Mar 29, 2020 2:08 PM

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Posted on Mar 30, 2020 7:43 PM

This is not a bug but the expected behavior. In a nutshell, If you change the sample rate then you change the time reference of the entire project.


More info: https://help.apple.com/logicpro/mac/10.4.7/?lang=en#/lgcpce0958b8


Audio sample rate, SMPTE, synchronization, MIDI timing... could be challenging concepts when you begin in audio/video.


WD

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Mar 30, 2020 7:43 PM in response to atomheart4

This is not a bug but the expected behavior. In a nutshell, If you change the sample rate then you change the time reference of the entire project.


More info: https://help.apple.com/logicpro/mac/10.4.7/?lang=en#/lgcpce0958b8


Audio sample rate, SMPTE, synchronization, MIDI timing... could be challenging concepts when you begin in audio/video.


WD

Mar 30, 2020 6:25 PM in response to atomheart4

This is bizarre. Bear with me, this is probably going to get long winded. I filed a bug report but that form in Logic is pathetic. I saved that which I posted above as a new project yesterday. Today I opened the original project. The additional drum tracks that I had imported yesterday were not there , as expected. But all the tracks there were split just like the above. That's not the way I started the day yesterday so they should have been unmolested. One detail I left out yesterday. One track was split into those smaller regions. It was the original audio mix that my bass player sent me. I often will take a track and split it into color coded split regions to help visualize the arrangement. the splits that spontaneously appeared on the other tracks were mirror images of that. Except everything now had those spaces and all colors were gone.

I usually work at 48 kHz. When I noticed that the project was now showing up at 44.1 kHz I switched it back to 48. When I did that the split regions jumped apart showing the same spacing as above ! Changed it back to 44.1 and they immediately rejoin. Incredulous I went to the new project I saved yesterday with the splits and checked the sample rate. It was at 48kHz. Changed it to 44.1 and everything was rejoined. It does it every time back and forth. Most bizarre bug I have ever seen. I can't help but wonder if this is somehow related to the well documented bug of timing change that Logic is applying to imported audio. I mean if you look at it on it's face the tracks are being changed in length. Imported audio is changed in length, not in pitch. Changing sample rate changes length, not pitch. I don't know .

Mar 31, 2020 2:29 PM in response to Wilddrums

Very easy to understand. In all my years working in Logic I just never encountered this. Makes sense. I am not in the habit of changing sample rates in the middle of a project. I was merely trying to reset it to what I had started the the project in. Setting aside how or why it happened to end up at 44.1kHz instead of my usual 48kHz there is still the question of why it took the splits I had made on one imported audio track and applied to the other tracks, except for the ones I was soloing at the time. Resetting the sample rate to 44.1 effectively rejoined all those, still split but contiguous so that play back is seamless. Is that expected behavior though, to copy the splits in one track? I know there is a way to do something like that through the split regions by track process assigning multiple tracks. But I certainly was not in the process of doing that. That happened on it's own.


In any case knowing what is or is not a bug is comforting knowledge so thanks. I have been having problems importing compressed audio files and having them play at different speeds. I had wondered if tempo data was getting embedded in the audio file somehow. Now I'm wondering if it isn't sample rate data. I'm trying to get my players to send tempo and sample rate correct and uncompressed tracks. Hopefully that will side step any such issues. Thank god we can do distributed recording these days.

Mar 31, 2020 4:29 PM in response to atomheart4

"why it took the splits I had made on one imported audio track and applied to the other tracks". Difficult to tell without knowing the previous state of the project.


"I have been having problems importing compressed audio files and having them play at different speeds.". Are you on Catalina? This a known issue with Catalina. Yes, converting to uncompressed format is a workaround.


WD

Why did Logic slice up my project???

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