Ableton Forum

Didn't go through the 12.3 version and installed 12.3.1 on my 2021 mbp M1 running 12.7.6.
Had a try with the stem separation yesterday on a 6 mn track, and intended to try the difference between the fast and high quality settings. Live crashed after doing the high quality stuff and I noticed a huge hit on the memory usage (48 Go) in the mac activity monitor.
Anyone else noticed that ?

It's a known issue and we're working on a fix.
It's only happening with High Quality mode.
Since it's not happening on all silicon machine it'd be great if you could report to Support as your logs might reveal some interesting bits of info.

Yesterday I tried on a shorter excerpt and it didn't crash but the Activity Monitor showed the memory going wild. I'm going to redo the whole track hoping I get a proper crash. Is there any way to get the relevant log without the app crashing ?

The crash pack is perfect, just make sure to attach it to a report to Support rather than the "crashes@ableton".
And if Support needs other files they'll just ask you.