Clipping compensation when using Built-In Output
Hi, I wonder if anyone could shed some light on something that's really confusing me. Someone has sent me a mix to listen to in Pro Tools and when I played it back through my studio speakers (via and AVID HD interface) it was just insane distortion from the master output clipping, like +20dB of overload. It sounded like some kind of experimental industrial noise piece (it's meant to be a pop-country song). When I mentioned this to them they said that they hadn't noticed anything like it and I started to wonder if they must have something wrong with their hearing, because it was ridiculous. So just to be sure I played it back using the Built-In output on my mac and listened to it on headphones as that's how they had mixed it and the clipping was completely gone. What is going on - does Mac OS have some kind of clip compensation built in? If so, can it be turned off? I'm trying to explain to this person why you shouldn't go over zero on the master output, but without buying them a decent audio interface they can't hear why.
Any help with this would be greatly appreciated,