“Drum Track”…?
what do you mean? What are the sources?
Stereo mixdown of acoustic drum kit played by a human and tracked using what mic set up?
A major release? Your original music? Multi tracks…
Electronic drum kit? EZ/ Superior drummer?
I only ask because the source is of vital importance IME when talking about unmixing with SL 
@ctreitzell
It was the drum layer from a song unmixed 1990`s pop song so most probably a programable sampling drum machine.I was comparing the drum separation of SL 12 with the same drum layer i used last year in SL 11 and there is a definite improvement.
If I’m honest, I tried to separate the hi-hat from the snare, because the track was already separated by the unmix drums function.
It was an electronic piece of music, about 8 minutes long.
The strange thing was the moment when Cubase crashed. The rendering ran at 99% both times, then it took a few seconds, and the Cubase prompt appeared, saying there was an error and to save.
Then I pressed the OK button, and Cubase vanished into thin air.
Did you get crashdump?
Yes, see above
Blind me, reading the last post… 
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The switching between “m” and “s” does not work flawless as one could expect.
Seems like the eventhandling here needs some improvement. (Not something a developer would shout hurrah for…, because there are almost always “more important” or more interesting things to do, but a 100% correct eventhandling in the gui is elementary for cosumer satisfaction - you get the idea.)
wow, thanks! that is very helpful to give context to your processing
seems you don’t know the actual recording process as it is a known pop song
so, whether it was real drums or machine is not clear
Let me just say that in the 90s, we often got real acoustic sets to sound like drum machines
IME with SL, real acoustic drum set recordings have had the best separation for me…not to say that I have unmixed many songs, because I haven’t…I’ve mainly been working on film location sound NR and re-balancing
I wonder if anyone knows which drum machines unmix in SL better..808…HR16…Linn…Emu…MPC?
what are you trying to say? When I first got SL11 I was not wise to using mutes and solos in SL…it just didn’t behave like the DAWs I was using…I wrote about it last year, posted videos…you were here on this forum and we were interacting then as well…
turned out I didn’t understand the design
So, are you talking about sluggish performance or unexpected behaviours…because your screen shot shows me nothing out of the ordinary…what are you trying to show?
Just try for yourself with some lage layers and think if it really meets your expectations on this simple switch.
I don’t have SL12…can’t afford the update right now
so I can’t test whatever issue you are reporting
The “m” and “s” switches also do not work 100% as one would expect in v11.
Use them in combination with “STRG” and several layers. Also work quickly, i. e. move the mouse while clicking and watch exactly on how those switches react.
There seems to be some kind of glitch with the event handling.
Mouseup, Mousedown, etc…
The eventhandling in all its details is far from easy. I think, that I have reported this already for v11.
For this kind of testing, I take 200€ per hour and I promise you, I’ll find every glitch fast.
