How do you use autism to filter something? Did you train this?

That's the wrong baseline. If you start out oblivious that people are telling you things (with their expression, or with the noises they're making) you get that filter for free. The work is in _not_ filtering out such things. First you have to realise that's a thing (somehow? good luck with the bootstrap), then learn to pay attention, then try to make sense of the result.