4.1 is indeed ready for Debian 13, thanks! /opt/lame-4.1beta1/frontend$ ./lame --help LAME 64bits version 4.1 (beta 1, Nov 6 2026) (https://lame.sourceforge.io) usage: /opt/lame-4.1beta1/frontend/.libs/lame [options] <infile> [outfile]</infile>
$ uname -r 6.12.111+deb13-amd64
Cannot use with latest Debian (trixie)