BOC: Al on double bass

[Ted Jackson]

On 6 Aug 2001, at 1:30, Brad Dahl wrote:

> >>>(how about that live Dizbusters on the T&M remaster?) but using a
> >>>double
> footed approach to fills can be quite awesome.
>
I'm not too up on the tech side of drumming, but I could swear the
last time I saw tBS, Al was using a double pedal on one bass drum.
Is this possible?  Is this done so that you can get a double sound
without having to transport an extra bass drum?  Also, when
drummers use 2 bass drums, are they tuned differently?  I think I've
seen drummers with a double bass setup use 2 different drums.
Possible?

theo