alsa-base binary package in Ubuntu Focal armhf

 This package contains various configuration files for
 the ALSA drivers.
 .
 For ALSA to work on a system with a given sound card,
 there must be an ALSA driver for that card in the kernel.
 Linux 2.6 as shipped in linux-image packages contains
 ALSA drivers for all supported sound cards in the form
 of loadable modules. A custom alsa-modules package can
 be built from the sources in the alsa-source package
 using the m-a utility (included in the module-assistant
 package). Please read the README.Debian file for more
 information about loading and building modules.
 .
 ALSA is the Advanced Linux Sound Architecture.

Source package