the soundcard es1371 is listed in the official alsa-driver list on the web (to which the doc of gentoo refers). When compiling a new alsa driver specifying env 'ALSA_CARD'=es1371 as said in the documentation, the driver won't compile, reporting that it does not support es1371 (which is a 16 Bit soundblaster). Reproducible: Always Steps to Reproduce: 1.install alsa-driver on a machine with an es1371 2. 3.
that's becasuse the driver is 'ens1371' :)