The Voice in Harry's Head

[Shell]

No: HPFGUIDX 131752

Okay, this has been bugging me for quite a while now.  I've been re-
listening to the books (for about the 30,000th time now!) and I've 
decided to put it to you all.

In GOF, when Moody puts the Imperious Curse on Harry, he hears a voice 
in his head that helps him fight the curse.  Who is this voice?  Is 
this a remnant of Lord V?  Or something else?  I can't recall if JKR 
ever explained this.

Anyway, would love to hear what you all think of this.

Shell