> regarding Skip's comments: I'm not sure I completely understand.
> the parallelism is not vital. I just want to use an existing
> program (resample in this particular case) as filter to read
> some of my data, process it, and give me the result, after which
> I continue with my own thing. 

just this: in your example, if parent needs to write more than some
pipe-buf-limit (i think 32k) to child and/or if child produces output
larger than this limit and blocks on the write, it would be a problem.

i attached my example of using only one pipe which requires two
rendezvous points and customization of the slave proc; this could
have a deadlock when a child requires multiple reads to cause a write.