Steve Simels of the awesome blog PowerPop found and posted this gem.
It's Grace Slick's original vocal track from White Rabbit, unaccompanied. It starts around thirty seconds in, after the introduction (which you can't hear) so be prepared for the silence. Early in the morning, which this is, I can't read very well and I read this as being the 'uncompressed' vocal track and wondered vaguely how much compression there was in 1966, and whether that's something Jefferson Airplane would have indulged in.
Simels thinks Jefferson Airplane have a pre-echo of punk rock, but on this evidence I have to disagree. It sounds like 1966 - I can hear the icy purity of Sandy Denny (of Fairport Convention) but each line seems to end with a warm, Germanic inflection that reminds me of Nico. I can't tell if Slick is doing this on purpose, or if it her own style.
I know someone who can't listen to female vocals. Listening to this outpouring of power and dynamics, I have no idea why.