We are looking for a source for a 12-volt DC MIDI-controlled valve
that will fit into player piano tubing.  I know that Ragtime West has
one, but it is almost $15 per note.  Does anyone have a source for
these valves?

Galen Bird

 [ Mike Ames described a very similar valve, but for a pressure system,
 [ in "Journal of Mechanical Music", Vol. 47, No. 1, Spring 2001.  A
 [ significant aspect of this design is that the in-line valve includes
 [ a chamber connected to the system air supply (pressure or suction)
 [ which make the pneumatic operation much faster in spite of the added
 [ hoses.  -- Robbie