Maintainers for libsox-fmt-mp3 are Debian Multimedia Maintainers <debian-multimedia@lists.debian.org>.
You may want to refer to the following packages that are part of the same source: libsox-dev, libsox-fmt-all, libsox-fmt-alsa, libsox-fmt-ao, libsox-fmt-base, libsox-fmt-oss, libsox-fmt-pulse, libsox3, sox.
You might like to refer to the libsox-fmt-mp3 package page, to the Package Tracking System, or to the source package src:sox's bug page.
If you find a bug not listed here, please report it.