Do any of the tracks on the Stroboscopica compilations released in
Italy by Plastic Records (The first two albums seem to be out of print
and are pretty hard to find, but mp3s can be found here:
http://endlessmike101.blogspot.com/2005/11/italian-library-music-post-2.html)
come from movie sountracks?  Some of the tracks are by prominent
Italian movie composers such as Ennio Morricone, Alessandro
Allesandroni, and Franco Micalizzi, but I've never encountered these
pieces of music anywhere but these compilations.  Information on some
of the more obscure artists such as Mingross and Freedom Power and
where I can find more of their music would be appreciated too.

These albums have very little in the way of liner notes, and I haven't found any
information on the somewhat mysterious origin of the music.  Can
anyone help me?  There are some pieces of music on the third volume
that I've listened to about a million times, and there's one piece of
music that I listen to almost every night before going to sleep
(Carter by Mingross), so I'd be very interested in learning more about
the origin of the music.

Recently, I commented on another question, which was asking for
information about a specific song. As a result of what I learned in
seeking that information, I?m going to suggest that answering your
question might be difficult, certainly time-consuming, and perhaps
impossible. Here?s why: the music in this compilation is what is
called ?production music,? music specifically designed to be used as
backgrounds in multiple media sources, including movies,
advertisements, videos, etc. Usually, these pieces are catalogued in
production libraries and are available for purchase within the
industry. As with the song a previous questioner wanted, such pieces
of music are not necessarily credited to the composer on websites like
Imdb or even on soundtracks when they are released, unless the
composer has written and/or compiled the entire soundtrack. Sometimes,
depending on the style of music, pieces might make their way onto
compilation discs created specifically for radio play, and (more
occasionally) onto a "best of" cd released for public sale (e.g. "Best
of Smooth Jazz Radio").

Fortunately, in the last quest, the writer of the song also records as
a solo artist, had his own website, and actually responded to the
questioner. But I suspect that in many cases, finding more information
about some of these more obscure composers who do music for Italian
production libraries would be difficult, especially since it appears
from reviews of the albums that most of this music was written well
back in the 60s and 70s.

Here are some excerpts from reviews/descriptions of the albums that
identify the pieces as production music and/or from music libraries.
This information will probably only verify what you already know, but
perhaps add a few more details to the picture.

?Stroboscopica Vol. 1 & 2 are two well-rounded comps of psycho beat
lounge and jazz funk, much of which was used by Cinecitta movie
studios in the 60s and 70s. . . . Stroboscopica 3 features "20 jazzy
orchestral Latin strobo sounds from cinematic 70s filmworks." At least
that's what the cover says -- and for the most part, that's true.
While a couple of the tracks are familiar from other compilations,
most of the set is unfamiliar sound library stuff from little known
Roman labels such as Gemelli.?

http://www.scorebaby.com/series.html

?Plastic Records continues to document the 70?s output of the Italian
Cometa production music library with this second volume in the
STROBOSCOPICA series. Like most production music, the tracks herein
are short, simple, and indexed by instrumentation, tempo, and style.
While certainly not in the same league as the full-length film scores
of Morricone, Allesandroni, et. al., the music here is functional and
fun. More reminiscent of 70?s television than anything else, the
somewhat cliched compositions evoke suspense, anxiety, mystery,
action, romance, and the hustle and bustle of daily life.?

http://spidey.kfjc.org/index.php?p=705

Here is the definition of production music from Wikepedia:

?Production music is background music used for many media sources,
such as television and radio advertisements. They are presented as a
less expensive option than commissioning a composer for custom music
or paying for the rights to use commercial music, as some
organizations may find the cost for either one of the latter two
options prohibitive (or at least uneconomical).
Production music has also been used by professional wrestling
companies such as World Championship Wrestling and World Wrestling
Entertainment for wrestler entrance themes, pay-per-view themes or
video packages. Example of popular themes that were taken from
production libraries are Goldberg's Invasion theme and Booker T's Ice
Cold theme (referred to by WCW as Rap Sheet)."

http://en.wikipedia.org/wiki/Production_music

Perhaps someone will be able to uncover more specific information for
you (the official Google Researchers are pretty amazing), but I'm
guessing that the amount of time involved in tracking it down, and the
probably requirement of being able to read Italian (!), would require
a higher remuneration than the amount you currently have posted.