Bill Finch wrote in MMD 2000.01.12.08:

> The easiest way to voice organ pipes is to build a voicing table.
> This is really no more than a variable speed blower which will supply
> dynamic wind pressure (e.g., while the largest pipe is speaking)
> equal to or greater than that for which the rank is designed. ...

You could include a pressure regulator, a valve, and a key to turn the
wind on and off.  A really most important part of the voicing is to get
the tone onset transient sound right, not only the stationary hoot.

 [ Synonyms: chiff, attack ; steady-state  -- Robbie ]

> It's a good idea to anchor the pipe to the table so that the lighter
> ones don't get projected across the voicing room when you turn the
> blower on.  A wife will do for this job if the number of pipes to be
> voiced is small.  Otherwise build a clamp for the pipe foot.

Wonder what kind of pipes and pressures you are talking about; must be
calliopes to be that violent.  But to listen to the repetitive monoton-
ical sounds in voicing even normally pressurized organ pipes is an
ordeal.  Avoid exposing anybody you care to keep as a friend unless
he/she has a technical interest in the procedure itself.

> Also wear ear muffs of some sort; gun shops sell good inexpensive
> ones.

See the article in this MMDigest on the ear and hearing protection.

Johan Liljencrants