Craig Brougher wrote in 011124 MMDigest:

> If you will turn off all other percussion and solo instruments
> and just listen to the piano score alone, you will be able to tell
> if something is wrong with the sustain pedal track.

Using a brisk 4/4 time, it engages for two beats, off for two beats,
on one beat, off three beats, on one measure, off two beats, and so on.

It seems totally screwy to me, but that is how the roll is punched.
The triangle works fine, the hammer rail is disabled (for the same
reason) and the mandolin works perfectly.  The other instruments,
including an accordion set-up that I built from scratch, work
flawlessly.

Larry Mayo

 [ Is an "O"-roll test roll available somewhere?  -- Robbie