In a Lonely Place (1950)

The original monaural soundtrack was remastered at 24-bit from the original 35mm soundtrack negative at Chace Audio by Deluxe in Burbank, California, under the direction of Grover Crisp and Bob Simmons. Additional restoration was undertaken by the Criterion Collection using Pro Tools HD and iZotope RX4.

This additional 'restoration' consisted of further rolling off the high- and low-end, which is noticeable when comparing the Criterion and Sony blu-rays. But Chace Audio is the main culprit here.

More interestingly, the blu-rays and DVDs use different mixes. I believe the DVD tracks were created by combining lower generation Music & Effects and Dialogue tracks because the music/effects on them are consistently differently synced with the dialogue by a few milliseconds and the music in some scenes is legitimately louder (beyond any differences from EQ). The sound effects on the DVDs/BDs are the same except for one short segment from 01:27:03 to 1:27:09 (blu-ray timecodes) in which Bogart's knocking on Gloria Grahame's bedroom door is much less buried in the mix on the blu-rays.

The R1 and R2 DVDs have some different EQ, surprisingly. I prefer the R2, but they're pretty similar overall.