>I'm sure some will beg to differ (Jim) but one of the best 'period' soundtracks I'm aware of in any movie is that found in Jack Clayton's 1974 adaptation of 'The Great Gatsby'.
Mediocre. Again, perfectly suited to the film in question. The CHOICE of material was brilliant; the execution less so. A curse which later resufaced, disastrously, in Chicago: the music of the 1920s does not "translate" well to modern ears. Too harsh; some would say dischordant in places. So, Hollywood tends to dull it down by giving rather lush 1940s style arrangements to music which was originally anything but lush.
Try this: find Marilyn Miller's original recording of Jerome Kern's "Who?" Then, find Judy Garland's 1946 version of the same song, from when she played Marilyn Miller in Til The Clouds Roll By. Then, listen to the Gatsby soundtrack version and see whether it favors 1923 or 1946.
If you can find it, check out the Jazz Singer reissue with the bonus DVD of 1927-29 musical shorts. The best film on it ("Roof Garden Revue")shows how fun the original harsh orchestrations COULD be, and also shows exactly what one would have seen at a 1927 rooftop nightclub. The worst film of a very bad lot, "The Night Court" ALSO features several nightclub acts but....frankly....they really suck, and seem so far removed from what we know as quality entertainment that they seem to be from another planet. The rest- dozens of hotel orchestras, very middle of the road, give you an EXCELLENT idea of the quality (and arrangement)of the music that someone of jay Gatsby's sort would have had at his parties. And, demonstrates why Hollywood avoids faithfully reproducing the music of the era...unlike the costumes, cars and decor, it does not make the jump into the present day very well.
So, with the Gatsby soundtrack, there was a dissonance between what one was seeing onscreen and what one was hearing; images of the 1920s, but orchestration of the 1940s. Rather like Eisenhower-era footage overdubbed with 1980s techno music in a 2008 film....multiple layers of confusion.
Actually, the film Titanic would have been best suited with NO score at all. A carry-over from silent days, music dubbed over film is the cinematic equivalent of a laugh track. If, through script, acting, and editing you cannot convey the mood you are trying to establish to your audience, then you've already half-failed.
>(And, whilst we're on the subject of this particular version of 'The Great Gatsby' - I possess an old copy on VHS. This features all the wonderful music I've mentioned above. However, I once caught the same film broadcast on terrestrial television here in England and I was staggered to find that the soundtrack had been dubbed over with different tunes entirely - not one of which was a patch on those I'm most familiar with! Why, oh why, this should have been - copyright or something - I have no idea).
Because, the original recordings were still covered by the original 1974 contracts when the VHS tape was issued. The owners of the music, the writers of the music, (possibly) the performers, and various other rights-holders had signed contracts pertaining to the specific ways their music could and could not be commercially used. VHS and home video as we knew it did not exist in 1974. Therefore, the fiercely protected "Rights of Usage" did not extend to that field. And so one finds quite a few videos from that era with new music overdubbed.