Switching Patterns immediately

Using Ableton as my main brain I am searching a way to switch pattern immediately.

The only way is a hack I believe stopping the sequencer every bar and starting it the next again. The OT, which I don`t own uses Midi Notes to start and stop sequences.

And there are some Sysex Commands for the Digitakt for start and stop the sequence. I really do not have any idea how to program start/stop the DT in ableton.
Any Ideas?

Related topic:

Octatrack workaround: