I haven’t tried that specifically (I may test it out later), but I have sent a control voltage signal into my audio interface and then I’ve had Ableton follow it using the Max for Live CV Clock In plug.
There’s one thing that kind of holds true regardless: Ableton runs at a much higher resolution than practically any audio pulse or CV sync you can send it. So it needs a bit of pre-roll to get locked in. If the Ableton tracks start immediately, there’s a stutter because, until Ableton receives 1 or 2 more pulses that it can interpolate, it doesn’t know what to do with its higher resolution data. The same holds true for real-time tempo changes even after the track is running and already locked in. But it is serviceable at least.
In almost every case I can think of, the device with the higher resolution should be the master for the best experience. But then Ableton is running on a computer where the MIDI output may not be great for MIDI Clock, which is why the overall best course seems to be using Ableton as the master sending audio clock at 24 PPQN instead of MIDI.
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