Question: Can you identify the name of this tune and the artist(s) who
recorded it based on the following (admittedly rather vauge)
description?

Here goes...

In the summer of 1984, I remember hearing an instrumental tune that
was broadcast as one of the pieces of music used regularly on a radio
program devoted to the topic of science fiction. This show was
broadcast on a non-commerical radio station in the Los Angeles area,
perhaps KPFK-FM ("Hour 25"?) or KCRW-FM.

Unfortunately, I don't know the title of the piece. Nor do I remember
the artist. Nor can I recall the name of the program on which it was
played.

(Note: The reference above to KPFK's "Hour 25" is merely an informed
guess, since that is the only radio program I could find reference to
via a web search that is in the LA area and has a format and longevity
matching what I was listening to in 1984. Perhaps there was/is
another program with these characteristics?).

However, I do remember these things about this piece of music that
might help to identify it:

** The composition was not unique to the radio program on which it was
regularly played -- I remember hearing it elsewhere, played as a
regular piece of music,

** It sounded like it was composed using a synthesizer, and was
definitely "electronic", "techno", "ambient", or "new age" in its
feel,

** It had a slow pace, giving the tune a "hypnotic" quality,

** The tune reiterated the same theme,

** The sound was that of pipes, and a chorus of muffled voices,

** The sound was "layered" -- It began with a single pipe, added more
pipes, and then, eventually, the voices,

** The voices sung no discernible lyric (at least as far as I can
remember), functioning instead as part of the sonic landscape of the
piece,

** As mentioned above, the tune had to have been created prior to the
summer of 1984, when I first remember hearing it.

That's as much as I can describe about this piece, given the
constraints of a faulty memory and abject ignorance of musical
terminology.

Despite these limitations, I'm hoping that someone might be able to
assist me identifying this musical work's title and artist.