debian's installation program gives you an option to
configure your kernel"install some modules"
usually the sound-cards modules locate in the "misc" section
,open it and you will find your sound-card,pess"+" or "Enter" //don't rem
to install it as a module
or you can do it manually:
#cd /usr/src/linux
#make menuconfig
go to to sound's section and press "m" beside es1371
then exit
#make modules
#make modules_install
then
#modprobe es1371
now have fun with your mp3s