Scaler 2 DAW Sync?

Could someone please explain what DAW Sync does.

I’m using Scaler 2 in Logic Pro X occasionally as a Virtual Instrument Plug-in and mostly as an AU MIDI Controlled Effect and can’t detect any difference with DAW Sync on or off.

Not covered in online manual.

Check my video here:

Like a drum machine if you hit play in your DAW it will play scaler and keep it in time.

Will have a look later.