Two looping questions from a neophyte

[Paul Sullivan <paulsull@gis.net>]

> Is there a way to continuously loop from one delay to another? I loop on
> a Boomerang,and then sample a segment of that loop with a Headrush. After
>
> overdubbing on top of that segment  I want to be able send it back to be
> overdubbed on the boomerang, then grab another segment with the Headrush,
> and so on. Without
> using two A/B boxes is there anyway to do this?
>
> Neither of my delays is tunable. What is the best way to be able to
> speed up or slow down a loop? Perhaps a pitch shifter after the delays?
> Any help would be greatly appreciated.
>
> Thanks very much, Paul Sullivan.