Looks like in wgpluck (pluck.c), the exitation signal is simply added to
the output, without being introduced into the waveguide, as what appears
to be done correctly in wgpluck2 (repluck.c). 

History on these two opcodes, anyone? Why are there two different ones?
Is "wgpluck" considered obsolete/buggy and left in for compatibility?
Should I submit a patch to fix this bug?

Incidently, it is only by accident that I discovered this, since it is
not clear from the doc for wgpluck that the "aexcite" param can be zero
(why isn't it optional then), if you just want an ideal pluck
excitation. It isn't very clear the way it's doc'd, I thought at first
that aexcite was a "pluck" signal that would be applied to the waveguide
at the pluck point. (How can I submit a patch to the manual?)

Larry