If you run the same batch of files two times using -R, do you get the same pattern of truncations both times? Dave Graff From: Scott Temby Reply-To: "sox-users@lists.sourceforge.net" Date: Thursday, June 17, 2021 at 10:03 AM To: "sox-users@lists.sourceforge.net" Subject: [SoX-users] "norm" effect causes intermittent truncation of MP3 output. Hi, When using "sox.exe .wav -C 192.01 .mp3 norm" I've found the output is occasionally truncated (shorter duration than the input, but matches up to that point). I've tried this on a few systems, and while the fault is intermittent (not linked to any particular input file or condition), it does repeatedly occur (a few times in a "batch"). Immediately re-processing the same input files often yields success, or at least, failures on different files. I've also tried -C 192.2 to see if that was the issue, and it is not. removing "norm" solves the problem, and I can reliably encode thousands of files without truncation. Hopefully there's an easy fix, if not, at least you are now aware of the issue. Regards, Scott