OK, some additional info that should have been posted right away: system: Gentoo Linux version 6.1.12 ffmpeg: 4.4.3 sox: 14.4.2_p20210509-r2 dr14_tmeter: 2.0.0 T04.flac and A.flac are indeed the same file, I forgot to adjust the name in my original post. B.flac has size 147,664,506, C.flac has been deleted but was in the region of 160,000,000. Re-encoding C.flac (sox C.flac CC.flac) results in a file almost the same size as B.flac with the same dynamic range as B.flac, and gives the error message: "sox WARN flac: decoder MD5 checksum mismatch." So something's fishy about C.flac, but the gain in dynamic range was intriguing. A.flac had been extracted from A.mkv by means of ffmpeg; I don't think sox can do that. I needed A.flac to determine the splitting points (using audacity). Now that I know the splitting points, I'll try to extract C.flac directly from A.mkv using ffmpeg. As far as I know, I cannot do that with sox, though. However, I need to re-create A.mkv first, unfortunately under windows :-( Maybe tomorrow. _______________________________________________ Sox-users mailing list Sox-users@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/sox-users
