David Stankov wrote:

> I have a Welte roll that I would like in a lower key for a voice
> accompaniment.

In principle it is possible to transpose the notes lower and leave
the expression the same when copying a roll, but there is a problem
with the notes at the division between the treble and bass expression
sections.  It would be necessary to edit the bass expression to handle
the notes that were previously handled by the treble expression.

Since the music is for accompaniment it probably has relatively little
dynamic activity, so that might not be difficult.  Even so it would
take a fair amount of time to do the editing.

Bob Billings - Sierra Music Rolls
Reno, Nevada