Haven’t tried Rebeat yet but I see from their manual p15 or so that there’s a lot of info crediting specific open-source/demucs guys in relation to how they’re doing their approach.
May/may not be the same way Robin’s implementing SL code.
I may experiment this week on a 1968 track of mono-mixed drums from a project I’m working on that’s of…let’s say…dubious sonic quality when it gets to the drums 
Drums were originally tracked with only an overhead mic, mic on sn/hh, and bd mic.
May as well see how rebeat does compared to sl, get an idea of how long its standalone analysis pass takes, how it handles the 3 toms etc etc.
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ReBeat gives excellent results when it comes to unmixing individual drums from a drumkit stem. It is great for remixing/remastering, the resulting sounds are of very good quality indeed.
As always, cymbals (ride & crash) and hi-hat are not as easy to get pro results with since those often are buried or hidden to some extent so that their energy is ’consumed’ by kick/snare/toms. But it’s quite easy to fix with external eq:s and transient designers.
The Toms ”track” or ”channel” is one common channel for all toms.
There’s one ”Other” channel where percussion like timbales and cowbell end up, of there is any in the original drum stem. Neat.
The Kick and Snare channels have a crippled variant of Drumagog, where you can replace those drums with multisampled .gog sounds or your own one shot samples.
There is MIDI out on those channels to trigger drum VSTi:s like SD3.
All of the channels have a gate and a transient designer.
It works really well; it has only a stereo output as a VST plugin but the standalone version saves all of the seven individual stems in one go.
The time it takes for the app to unmix a drumkit stem is about the same as in SL11, or a wee bit faster. On Apple silicon computers it uses the GPU part of the CPU. On PC:s it doesn’t use the graphics card, only the CPU.
It can also separate a drums stem from a full mix, just like SL But I haven’t done that.
There is a simpler version out now that is only standalone.
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Good info. Interesting. I own sd3 and most tt expansions… Does rebeat create a separate chnl10 midi file for each extracted drum? Or a sort of combined single midi file after analysis, separate from audio results?
I suppose I should just go check it out. Are those guys using ilok?
I have not tried the MIDI function yet.
MIDI is only for kick and snare so far. I believe the creator is planning to implement the auto tracking MIDI for hi-hat from Drumagog shortly. He says MIDI for toms doesn’t make sense, since there’s only one toms channel and you often have more than one tom in that.
There is a tryout version (with annoying beeps…), check it out!
It’s not iLok, they have their own copy protection system.