I really don't take Brain's voice into consideration too much, because they seem to be mostly consistent with the new voice actors, ordinarily... one thing I HAVE noticed, on the other hand, is that every other time his voice changes, he sounds like he did originally... for example, after Luke Reid grew into his voice and Brain spoke with a much deeper voice, Steven Crowder sounded more like Brain. Then Alex Hood admittedly was a little too high in voice for Brain (yet somehow it doesn't really bother me), but then Paul-Stuart Brown came along and once again Brain sounded like he used to. So, it's almost like a pattern with Brain's voice: normal, too deep, normal, too high, normal, etc.