The Incredible Shrinking Man (1957)

The old MCA LaserDisc, although possibly a hodgepodge of different analogue sources (suggested by the varying levels of hiss throughout the film), sounds the most detailed and natural to me.

The Universal DVD, the Arrow blu-ray, and the Koch blu-ray share the same mastering and have more noise reduction and a compensatory high-frequency boost. Some segments of music arguably sound better with this EQ compared to the LaserDisc track (and I was able to match the LD to them with some EQ of my own), but there are only a handful of these moments spread throughout the film. The Koch blu-ray is a lossy transcode.

The Criterion blu-ray generally has more noise reduction than the DVDs and the other two blu-rays, but its EQ more closely matches the LaserDisc - though dialogue still sounds a bit comparatively hollow.