DL4 question

[Mark Hamburg <mark_hamburg@baymoon.com>]

The EH16 discussion got me thinking.

Not really a looping question vis-à-vis the DL4, but this list has an awful
lot of DL4 users. If I'm using it as an echo rather than a looper, can I 
use
the expression pedal to change the delay time and if so how well does it
respond to such changes? Does it give a nice analogue pitch slur or does it
sputter and cough and otherwise engage in digital hiccups? Or do they just
punt on the issue entirely and tie delay time only to the tap switch?

Mark