I've experimented with binaural beats for about a year and a half. Sometimes they work, sometimes they don't. I wouldn't say it makes it harder to WILD though in any case.

For me, I can't hear the sounds after I've entered the dream. Things do get freaky though as I'm transitioning from awake to asleep. The beats all run together into a high-pitched tone like you hear when you say "your ears are ringing." This is accompanied by the standard feeling of surges of energy in my body and powerful vibrations.

Over time, I think it's gotten less effective for me. Now I'm finding it hard to WILD no matter what I do. IDK why. But brainwave entrainment has been helpful for me in the past.