You can, at least with a computer. If you want to hear the result, go
to this page on KCN's MIDI site:

http://www.angel.ne.jp/~kcn/?.midi1c

KCN has "made MIDI files of those Double movements playing with the
original movement an octave below." The most convincing are the
faster movements, but all of them make sense this way, like some
maniacal lost keyboard partita.

Alan

--- In bachforguitar@yahoogroups.com, "shaktibris" <shaktip@b...>
wrote:
>
>
> I am curious about the doubles in the violin Partita No1. First of
all this seems to be Bach's
> only instance of this (not that I have really studied his works at
all). I wonder if they can be
> played over each other, or was it just an extentioon of an idea. If
anyone has seen any
> analysis on this I think it would be interesting.