R: Volume Pedal Question

["Luca" <lucafeed@tin.it>]

>...annoying artifacts from the 2112 and an erratic volume curve from the
VP.
>...so I can loop smoothly, evenly and atmospherically w/o building up too
>much noise.

are you sure not to have the 2112's noise gate in use ?
if it is, you sure would have a non regular and smooth curve of the volume;
with any volume pedal you will use.
Try to switch the noise gate off or put it at the end of the effect's 
chain.
As default it is usually at the start of the path, before the preamp.

Luca