There seems to be some confusion in this discussion of reeds.  There
are reed organs using metal reeds to create pipe tone. (The reed is
encased in a pipe shape resonator, or wooden box like chamber to
enhance the sound)

There are pipe organs that use metal, (usually brass) reeds in the
base of their pipes.

There are reed organs that use metal reeds to produce sound.  I am
talking about reed organ metal reeds.  I made one of aluminum that
worked quite well.  I have seen reeds made of plastic!

Bruce Clark